Iowa Patents and Inventors
Cerro Gordo County (1872-2021)
| Last | First | Title | Patent Number | City | Year |
|---|---|---|---|---|---|
| Adams | Robert | grate | 928921 | Mason City | 1909 |
| Aikin | Arthur | lug shield for tractor wheels | 1377794 | Mason City | 1921 |
| Alexander | Richard | intrinsically safe battery circuit | 4749934 | Mason City | 1988 |
| Alexander | Richard | method and apparatus for charging a nickel-cadmium battery | 4806840 | Clear Lake | 1989 |
| Alexandres | Richard | automatic resetting temperature controlled battery changing system | 4045720 | Mason City | 1977 |
| Alexandres | Richard | electric vehicle cell | 5521021 | Clear Lake | 1996 |
| Alexandres | Richard | small battery cell | 5532075 | Clear Lake | 1996 |
| Alexandres | Richard | laser inscribed battery case | 5418088 | Clear Lake | 1995 |
| Alexandres | Jon | golf vent | 5997407 | Mason City | 1999 |
| Alexandres | Richard | filling fixture for electric vehicle cell | 5914201 | Clear Lake | 1999 |
| Alexandres | Richard | method for vacuum filling and sealing of a battery cell | 5588970 | Clear Lake | 1996 |
| Alexandres | Richard | flexible welding board for battery pack | 5607793 | Clear Lake | 1997 |
| Alexandres | Richard | process and apparatus for spot-welding a flexible welding board to a battery cell | 5223690 | Clear Lake | 1993 |
| Alexandres | Richard | process and apparatus for spot-welding a flexible welding board to a battery cell | 5229566 | Clear Lake | 1993 |
| Alexandres | Richard | welding system for a battery pack | 5298712 | Clear Lake | 1994 |
| Alexandres | Richard | flexible welding board for battery pack | 5314764 | Clear Lake | 1994 |
| Alexandres | Richard | method and apparatus for measuring the voltage and charge of a battery | 5315253 | Clear Lake | 1994 |
| Alexandres | Richard | method and apparatus for measuring the voltage and charge of a battery | 5144248 | Clear Lake | 1992 |
| Alexandres | Richard | battery maintenance system | 5196779 | Clear Lake | 1993 |
| Alexandres | Richard | method of filling battery cell | 5738690 | Clear Lake | 1998 |
| Alexandres | Richard | method for making a battery pack | 5761792 | Clear Lake | 1998 |
| Alexandres | Jon | golf vent with ball return | 6193613 | Mason City | 2001 |
| Alexandres | Jon | battery housing for a portable radio telephone | 344926 | Mason City | 1994 |
| Alexandres | Jon | battery housing for a portable radio telephone | 348044 | Mason City | 1994 |
| Alexandres | Jon | cellular telephone battery | 349093 | Mason City | 1994 |
| Alexandres | Jon | battery housing for a communication transceiver | 349094 | Mason City | 1994 |
| Alexandres | Jon | cellular telephone battery | 350328 | Mason City | 1994 |
| Alexandres | Jon | cellular telephone battery | 352269 | Mason City | 1994 |
| Alexandres | Jon | battery housing for a communications transceiver | 355158 | Mason City | 1995 |
| Alexandres | Jon | battery housing for a portable radio telephone | 356065 | Mason City | 1995 |
| Allen | Clarence | lawn trimmer | 1505685 | Mason City | 1924 |
| Allingham | James | stove pipe thimble | 212532 | Mason City | 1879 |
| Anderberg | Oscar | building construction | 1805538 | Mason City | 1931 |
| Anderberg | Oscar | tile | 1854324 | Mason City | 1932 |
| Anderson | Maurice | life preserver suit | 1901859 | Mason City | 1933 |
| Anderson | Ricky | animal waste collection pit flushing apparatus and method | 5062387 | Mason City | 1991 |
| Andrews | Ray | molding means having opposed core assemblies | 4023769 | Clear Lake | 1977 |
| Angell | Thomas | electrical box retainer | 4693438 | Mason City | 1987 |
| Angell | Thomas | single piece, electrical box retainer | 303081 | Mason City | 1989 |
| Arnold | Frank | contact lens polishing apparatus | 3111790 | Mason City | 1963 |
| Arnold | Frank | projection apparatus for use in testing | 3111881 | Mason City | 1963 |
| Arvanitis | James | meat cutter | 2170512 | Mason City | 1939 |
| Ashley | Lloyd | saw filing machine | 1232476 | Mason City | 1917 |
| Attwooll | Robert | check rein | 319437 | Clear Lake | 1885 |
| Last | First | Title | Patent Number | City | Year |
|---|---|---|---|---|---|
| Backer | Paul | drawer front attachment system | 5375923 | Mason City | 1994 |
| Balek | Lynn | vehicle battery mounting apparatus | 4854540 | Mason City | 1989 |
| Balek | Lynn | auxiliary vehicle gas tank | 290452 | Mason City | 1987 |
| Balek | Lynn | auxiliary vehicle gas tank | 290829 | Mason City | 1987 |
| Balek | Lynn | vehicle battery holder | 310658 | Mason City | 1990 |
| Balfour | Matthew | elevator connected to wagon bodies | 124531 | Mason City | 1872 |
| Barber | John | hand truck | 2545440 | Clear Lake | 1951 |
| Barlow | William | crate for catching and holding hogs | 1455101 | Clear Lake | 1923 |
| Barlow | William | device for catching and holding hogs | 1353376 | Clear Lake | 1920 |
| Barragy | John | pig brooder | 2280779 | Rockwell | 1942 |
| Barz | Frederick | hay distributer | 1259071 | Ventura | 1918 |
| Barz | Frederick | attachment for cultivators | 1054491 | Ventura | 1913 |
| Barz | Frederick | clutch mechansim | 1069917 | Ventura | 1913 |
| Barz | Fred | hay fork | 1092087 | Ventura | 1914 |
| Beach | William | safety non clogable steam ans water cock | 1235418 | Mason City | 1917 |
| Beaver | Daniel | roofer's knife | 2459407 | Mason City | 1949 |
| Beecher | Adolphus | safety starting mechanism for motors | 815137 | Mason City | 1906 |
| Behrmann | Edgar | vehicle brake with brake cylinder bore insert | 5172793 | Mason City | 1992 |
| Belding | Samuel | trap nest | 1395942 | Mason City | 1921 |
| Bennett | George | loose leaf binder | 1496335 | Mason City | 1924 |
| Berlinger | David | seat faced engine valves and method of making seat faced engine valves | 6385847 | Clear Lake | 2002 |
| Bermel | Kyle | Tabbed nameplate on a ring | 9792840 | Clear Lake | 2017 |
| Billman | Gregory | ice maker harvest control and method | 6405546 | Mason City | 2002 |
| Billman | Gregory | ice maker harvest control and method | 6705090 | Mason City | 2004 |
| Billman | Gregory | ice maker control | 6612118 | Mason City | 2003 |
| Bilyeu | Roy | putter guide | 4647045 | Mason City | 1987 |
| Binnebose | Craig | anchor structure and method | 6547196 | Mason City | 2003 |
| Birdsall | Edwin | foot accelerator | 1459317 | Thornton | 1923 |
| Birdsall | Edwin | radiator air circulation control device | 1459318 | Thornton | 1923 |
| Blake | Robert | drying and dehumidifying means for corn cribs and the like | 2466362 | Mason City | 1949 |
| Blake | Robert | droppings catcher | 2484927 | Mason City | 1949 |
| Blake | Robert | sectional duct means having a fan for removing air from an enclosure | 2433544 | Mason City | 1947 |
| Blake | Robert | building ventilator having air inlets and outlets | 2489515 | Mason City | 1949 |
| Boyd | James | transmission unit | 3555930 | Mason City | 1971 |
| Brager | Carl | gravity door hinge | 1563154 | Clear Lake | 1925 |
| Brager | Oliver | gravity door hinge | 1563154 | Clear Lake | 1925 |
| Bresnahan | David | Liquid coffee concentrates and methods of making thereof | 8277864 | Mason City | 2012 |
| Bresnahan | David | Liquid coffee concentrates and methods of making thereof | 10136658 | Mason City | 2018 |
| Brogan | Jesse | pneumatic grain elevator | 606885 | Meservey | 1898 |
| Brooks | Clyde | ledger stand | 1559844 | Mason City | 1925 |
| Brower | William | lubricator for separating devices | 950201 | Meservey | 1910 |
| Brown | William | leakage discharge valve | 1527148 | Mason City | 1925 |
| Brown | Grover | Integrity-optimized receiver autonomous integrity monitoring (RAIM) for vertical integrity monitoring | 7956802 | Clear Lake | 2011 |
| Brown | Grover | Integrity-optimized receiver autonomous integrity monitoring (RAIM) | 7783425 | Clear Lake | 2010 |
| Brownmiller | David | Alignment assembly for a modular tower dryer | 8783444 | Mason City | 2014 |
| Brownmiller | David | Alignment and bracing assembly for a bucket elevator and method of using the same | 8668079 | Mason City | 2014 |
| Brownmiller | David | Paddle sweep | 10377573 | Mason City | 2019 |
| Brumm | Curtis | glass edge sealant curing system | 4820365 | Mason City | 1989 |
| Buck | William | railroad mowing machine | 1783517 | Thornton | 1930 |
| Bull | Ronald | modular beverage dispenser | 5437395 | Mason City | 1995 |
| Bull | Ronald | beverage cooler having a cold plate and plastic ice bin | 4651538 | Mason City | 1987 |
| Bull | Ronald | anchor structure and method | 6547196 | Mason City | 2003 |
| Burgraff | Louis | means for tire inflation | 1054504 | Mason City | 1913 |
| Burkheimer | Ivan | advertisement display thaumatrope | 270046 | Clear Lake | 1983 |
| Burr | Howard | internal combustion engine | 1087273 | Mason City | 1914 |
| Bush | Grant | fountain | 286261 | Clear Lake | 1883 |
| Byers | DeForest | strainer | 1458464 | Clear Lake | 1923 |
| Last | First | Title | Patent Number | City | Year |
|---|---|---|---|---|---|
| Cady | Edward | pitman | 374449 | Mason City | 1887 |
| Cady | Edward | corn harvester | 396538 | Rockwell | 1889 |
| Canella | Frank | rail joint | 1378009 | Mason City | 1921 |
| Cardarelli | Alfred | sign | 2164985 | Clear Lake | 1939 |
| Carlsson | Carl | System and method for XML subdocument selection | 9542502 | Mason City | 2017 |
| Carlton | Guy | toaster | 1178298 | Mason City | 1916 |
| Cawley | Frank | automatic safety shutter | 1359230 | Mason City | 1920 |
| Chappell | Edward | apparatus for ultra short wave therapy | 2526064 | Clear Lake | 1950 |
| Chazen | Samuel | hog shackler | 1467605 | Mason City | 1923 |
| Chazen | Samuel | scalding tank | 1532039 | Mason City | 1925 |
| Chenault | David | method and apparatus for forming a segmented mirror parabolic solar collector trough | 4253895 | Clear Lake | 1981 |
| Chipman | Donald | scope sight for archers | 6397482 | Clear Lake | 2002 |
| Chipman | Donald | peep sight for archers | 5697357 | Mason City | 1997 |
| Chipman | Donald | base for an archery bow stabilizer | 6431163 | Clear Lake | 2002 |
| Chipman | Donald | archery peep sight system | 7047652 | Mason City | 2006 |
| Chipman | Donald | sheet fabric slitter and reroller | 5121885 | Mason City | 1992 |
| Chipman | Donald | Multifunctional cooker system | 8733235 | Mason City | 2014 |
| Chipman | Donald | adjustable sliding archery bow stabilizer | 448827 | Clear Lake | 2001 |
| Chipman | Donald | adjustable archery bow stabilizer | 439947 | Mason City | 2001 |
| Clark | William | coupling for banana crates and the like | 1179282 | Mason City | 1916 |
| Connelly | Francis | mobile stand for medical equipment, primarily a cpap machine and accessories | 506259 | Mason City | 2005 |
| Conway | Albert | coupling for electric conductors | 917548 | Mason City | 1909 |
| Cook | Walter | telephone circuit | 691245 | Mason City | 1902 |
| Cook | Robert | card index case | 3234673 | Mason City | 1966 |
| Cook | Robert | card index case | 3293780 | Mason City | 1966 |
| Cory | William | mechanical locking outrigger hydraulic jack for an outrigger assembly | 4449734 | Clear Lake | 1984 |
| Cotton | Larry | tire manipulating apparatus | 4051966 | Clear Lake | 1977 |
| Cotton | Larry | tire servicing apparatus | 3970342 | Clear Lake | 1976 |
| Cram | Randall | roadside deer warning method and system | 5939987 | Clear Lake | 1999 |
| Creech | Virgil | governor | 1066586 | Mason City | 1913 |
| Creech | Virgil | spring motor | 1075023 | Mason City | 1913 |
| Crofoot | Edwin | antifreezing solution | 1581179 | Mason City | 1926 |
| Crofoot | Edwin | collapsible support for diffusion battery cell chains | 1669288 | Mason City | 1928 |
| Crowell | Guy | drive gearing for manure spreaders | 823846 | Mason City | 1906 |
| Currie | Frank | display cabinet or stand | 786104 | Mason City | 1905 |
| Last | First | Title | Patent Number | City | Year |
|---|---|---|---|---|---|
| Dall-Winther | Dennis | penlight holder | 272802 | Mason City | 1984 |
| Dall-Winther | Dennis | windmill | 4218183 | Mason City | 1980 |
| Daly | William | sink frame bracket | 1006361 | Mason City | 1911 |
| Daly | William | sink frame bracket | 1047757 | Mason City | 1912 |
| Davis | Harlan | modular beverage dispenser | 5437395 | Mason City | 1995 |
| Davis | Harlan | beverage dispenser removable driptray | 5542572 | Mason City | 1996 |
| Davis | Brad | Method of deployment for real time casing imaging | 8025445 | Clear Lake | 2011 |
| Davison | Timothy | Boom with two-block sensing system | 8863965 | Mason City | 2014 |
| Dean | Rickard | steam engine | 883866 | Mason City | 1908 |
| Dedic | David | hollow doorframe including electroluminescent illumination system | 7125136 | Mason City | 2006 |
| Degen | Paul | Process for producing metal foil labels in roll form | 8888943 | Mason City | 2014 |
| Degen | Nicklous | sander drum and floor sanding abrasive sheet | 2492849 | Mason City | 1949 |
| Degen | Nicklous | surfacing machine | 1920364 | Mason City | 1933 |
| Determan | Henry | fishing pole | 2360402 | Mason City | 1944 |
| Determan | Henry | milking machine | 1194603 | Rockwell | 1916 |
| Devary | Frank | watering device | 2154152 | Rockwell | 1939 |
| Dexter | Simon | combined adjustable pinchers and grappling tool | 136907 | Mason City | 1873 |
| Dexter | Simon | combined wrench and grappling tool | 137129 | Mason City | 1873 |
| Dexter | Simon | grapple | 137130 | Mason City | 1873 |
| Dick | Michael | Sand bag shovel assembly | 9781871 | Clear Lake | 2017 |
| Dick | Michael | Sand bag shovel assembly | 10392148 | Clear Lake | 2019 |
| Dick | Michael | Axle assembly | 9751560 | Clear Lake | 2017 |
| Dieckmann | George | compound for waterproofing cement and the like and making the same | 1023926 | Mason City | 1912 |
| Diers | Henry | milk strainer | 514646 | Clear Lake | 1894 |
| Ditch | Harry | tree trimmer | 1868349 | Mason City | 1932 |
| Dorenkamp | Matthew | Agricultural toolbar transport system | 9010451 | Mason City | 2015 |
| Dorenkamp | Matthew | Agricultural toolbar transport system | 9010451 | Mason City | 2015 |
| Downs | Gary | battery housing for a portable radio telephone | 356065 | Mason City | 1995 |
| Downs | Gary | cellular telephone battery | 352269 | Mason City | 1994 |
| Downs | Gary | battery housing for a communications transceiver | 355158 | Mason City | 1995 |
| Downs | Gary | cellular telephone battery | 350328 | Mason City | 1994 |
| Downs | Gary | battery housing for a communication transceiver | 349094 | Mason City | 1994 |
| Downs | Gary | cellular telephone battery | 349093 | Mason City | 1994 |
| Downs | Gary | battery housing for a portable radio telephone | 344926 | Mason City | 1994 |
| Downs | Gary | battery housing for a portable radio telephone | 348044 | Mason City | 1994 |
| Dutro | Samuel | door holder | 830980 | Mason City | 1906 |
| Last | First | Title | Patent Number | City | Year |
|---|---|---|---|---|---|
| Eagen | Peter | grain separator | 736370 | Cartersville | 1903 |
| Echelberger | Michael | discharge chute for trash receptacles | 5255769 | Rockwell | 1993 |
| Eddy | Charles | harvester | 246331 | Clear Lake | 1881 |
| Eitsert | Albert | folding crate or coop | 1409935 | Mason City | 1922 |
| Elliott | A. | car coupling | 392596 | Mason City | 1888 |
| Elliott | A. | car coupling | 359599 | Mason City | 1887 |
| Elliott | John | fastener for churn tops | 325164 | Mason City | 1885 |
| Elsom | Kyle | ice maker control | 6612118 | Mason City | 2003 |
| Elsom | Kyle | ice maker harvest control and method | 6405546 | Mason City | 2002 |
| Elsom | Kyle | ice maker harvest control and method | 6705090 | Mason City | 2004 |
| Emerson | Charles | car brake shoe | 448011 | Mason City | 1891 |
| Engelhardt | Philip | folding step | 1061828 | Swaledale | 1913 |
| Engelhardt | Philip | package tie | 48273 | Cartersville | 1915 |
| Erhard | Helmut | method of combining in-the-mill drying and firing of coal with enhanced heat recovery | 4280418 | Mason City | 1981 |
| Erickson | Henrick | planter mechanism | 2085354 | Clear Lake | 1937 |
| Erickson | Henrick | check row planter | 2052455 | Clear Lake | 1936 |
| Erickson | Richard | holder for casket flower spray | 3208701 | Mason City | 1965 |
| Escher | Esther | pyramid finger ring | 253049 | Mason City | 1979 |
| Ethington | Thomas | low profile ice maker | 6109043 | Mason City | 2000 |
| Ethington | Thomas | low profile ice maker | 6233964 | Mason City | 2001 |
| Evans | Frank | combination beer glass and cocktail shaker | 192604 | Mason City | 1962 |
| Last | First | Title | Patent Number | City | Year |
|---|---|---|---|---|---|
| Fache | Harvey | safety device for overshoes | 1207005 | Thornton | 1916 |
| Farrell | Daniel | limekiln | 180214 | Mason City | 1876 |
| Fawkes | Donald | cordless vacuum brush | 4956892 | Mason City | 1990 |
| Ferr | Henry | attachment for oil stoves | 1389497 | Mason City | 1921 |
| Ferr | Henry | window | 1381070 | Mason City | 1921 |
| Finley | Ansell | device for distributing and packing cosettes in diffusion battery cells | 1895185 | Mason City | 1933 |
| Finnegan | Edward | means for measuring trouser lengths | 2734270 | Mason City | 1956 |
| Fischer | Albert | arched metallic culvert | 1926843 | Mason City | 1933 |
| Fischer | Albert | head wall structure for culverts | 1620089 | Mason City | 1927 |
| Fisher | Merritt | dry roasting milo | 3879570 | Clear Lake | 1975 |
| Floy | Richard | underground pipe and tile laying apparatus | 4647252 | Thornton | 1987 |
| Foell | Charles | tongue truck | 960082 | Rockwell | 1910 |
| Fox | Carl | folding brace for connecting hinged elements | 2969249 | Clear Lake | 1961 |
| Fox | Carl | vertically adjustable support for table tops and the like | 2875007 | Clear Lake | 1959 |
| Francis | George | register | 2209494 | Mason City | 1940 |
| Frank | Michael | battery adapter capable of receiving power from at least two power sources and of being in a docking station, and a battery arrangement including a battery charger and a docking station | 6177778 | Clear Lake | 2001 |
| Last | First | Title | Patent Number | City | Year |
|---|---|---|---|---|---|
| Galindo | Carlos | sanding tool | 383369 | Mason City | 1997 |
| Gasswint | Charles | awning rod holder | 1950940 | Mason City | 1934 |
| Gasswint | Charles | awning fastening device | 2004862 | Mason City | 1935 |
| Gearhart | Stephen | Method and apparatus for determining proper curing of pipe liners using distributed temperature sensing | 8940113 | Clear Lake | 2015 |
| Geyer | Clarence | corn planter wheel shield | 2581526 | Mason City | 1952 |
| Gharst | William | stock loader | 1512756 | Mason City | 1924 |
| Glasener | Frank | collapsible seat or bed | 1379683 | Rock Falls | 1921 |
| Gordy | Dennis | seal for cells containing alkaline electrolyte | 5198314 | Mason City | 1993 |
| Gordy | Dennis | seal for cells containing alkaline electrolyte | 5057386 | Mason City | 1991 |
| Goslee | George | carbureter | 745489 | Mason City | 1903 |
| Gramkow | Gustav | animal poke | 740007 | Meservey | 1903 |
| Gramkow | Gustav | animal poke | 724003 | Meservey | 1903 |
| Grange | Paul | building ventilator having air inlets and outlets | 2489515 | Mason City | 1949 |
| Grange | Paul | sectional duct means having a fan for removing air from an enclosure | 2433544 | Mason City | 1947 |
| Grange | Paul | droppings catcher | 2484927 | Mason City | 1949 |
| Grange | Paul | drying and dehumidifying means for corn cribs and the like | 2466362 | Mason City | 1949 |
| Green | Charles | machine for sharpening disks | 534261 | Swaledale | 1895 |
| Green | Alonzo | grapple for hose | 297788 | Clear Lake | 1884 |
| Greule | Herman | button for telegrapher's keys, & c. | 714299 | Mason City | 1902 |
| Griffin | Ezra | pneumatic stacker | 766343 | Mason City | 1904 |
| Griffith | Bence | paraffin machine | 1172790 | Mason City | 1916 |
| Griggs | Charles | process for recovering fats and meat and bone scrap from inedible slaughterhouse materials | 3046286 | Mason City | 1962 |
| Gulbransen | Lars | mail delivery system | 1738894 | Mason City | 1929 |
| Gulbransen | Lars | window construction | 2044387 | Mason City | 1936 |
| Gulbranson | Hans | piston packing | 1032204 | Mason City | 1912 |
| Last | First | Title | Patent Number | City | Year |
|---|---|---|---|---|---|
| Hagen | Rudolf | machine gun | 1653171 | Mason City | 1927 |
| Hagen | Rudolf | golf tee | 1708774 | Mason City | 1929 |
| Hakansson | Louis | rotary impact engine | 585029 | Mason City | 1897 |
| Hale | Cutler | gate hinge | 366772 | Mason City | 1887 |
| Hall | Brian | drawer front attachment system | 5375923 | Clear Lake | 1994 |
| Halverson | Clarence | stock feeder | 2371617 | Mason City | 1945 |
| Halverson | Clarence | waterproof stock feeder | 1419468 | Clear Lake | 1922 |
| Hansen | Harry | antirobbery machine | 1823750 | Mason City | 1931 |
| Hansen | Clifford | dolly for handling doors and the like | 3138265 | Clear Lake | 1964 |
| Hanson | Hans | conveyer | 1570484 | Mason City | 1926 |
| Hanson | Albertus | ditching machine and tile distributer | 1026672 | Mason City | 1912 |
| Hanson | Albertus | ditching machine and tile distributer | 1022843 | Mason City | 1912 |
| Hanson | Albertus | window sash lock | 1023014 | Mason City | 1912 |
| Hanson | Albertus | ditching machine | 1048408 | Mason City | 1912 |
| Hanson | Albertus | fence post | 1080057 | Mason City | 1913 |
| Harkinson | John | hay elevator | 403103 | Mason City | 1889 |
| Harrison | Peter | Formulation for cleaning of hard surfaces and textiles | 9034811 | Clear Lake | 2015 |
| Hartnett | Edward | centrifugal pump | 247967 | Mason City | 1978 |
| Hartsaugh | D. | sketching apparatus | 424111 | Mason City | 1890 |
| Hathorn | Henry | felt boot | 384155 | Clear Lake | 1888 |
| Hathorn | Henry | pipe or tube sawing machine | 700118 | Mason City | 1902 |
| Hathorn | Henry | power hammer | 758361 | Mason City | 1904 |
| Hathorn | Charles | motor and machine stand | 1008821 | Mason City | 1911 |
| Hathorn | Henry | oil burner | 1539355 | Mason City | 1925 |
| Haukedahl | Arthur | aerial | 2151102 | Mason City | 1939 |
| Haukedahl | Arthur | picture hanger | 1945897 | Mason City | 1934 |
| Hays | Elam | water proof paint | 274599 | Clear Lake | 1883 |
| Henningsen | Dennis | insulation suspension system | 4449343 | Mason City | 1984 |
| Herman | Craig | Composition and method for treatment of warts | 8236814 | Mason City | 2012 |
| Hill | Bruce | power supplies for use in thermo electric refrigeration systems | 3005944 | Mason City | 1961 |
| Hillman | Paul | Slidable table for a vehicle | 9371029 | Clear Lake | 2016 |
| Hines | Kevin | adjustable foot brace | 5716336 | Mason City | 1998 |
| Holcomb | Walter | rotary engine | 680252 | Plymouth | 1901 |
| Holland | Herman | blade sharpening device | 2993312 | Clear Lake | 1961 |
| Holmlund | John | peg cutter | 696974 | Mason City | 1902 |
| Holt | William | condensed fermented whey animal feed product and method | 3840670 | Clear Lake | 1974 |
| Hovinga | Donald | ice cube dispensing outlet | 4679715 | Mason City | 1987 |
| Howard | Martin | windmill | 194822 | Clear Lake | 1877 |
| Howland | William | golf bag | 1644592 | Mason City | 1927 |
| Huang | Minjun | low profile ice maker | 6109043 | Mason City | 2000 |
| Huang | Minjun | low profile ice maker | 6233964 | Mason City | 2001 |
| Hudson | Harold | System and method for construction modeling | 9121173 | Mason City | 2015 |
| Huffman | Charles | automobile body | 43046 | Mason City | 1912 |
| Hughes | William | tuyere | 1930897 | Mason City | 1933 |
| Hughes | John | divider board | 1582753 | Clear Lake | 1926 |
| Hulbert | Alfred | show case | 526625 | Clear Lake | 1894 |
| Hull | L. | fabric shoe | 253316 | Mason City | 1979 |
| Humphreys | Franklin | smoke consuming flue | 636044 | Mason City | 1899 |
| Humphreys | Franklin | smoke consuming fireplace | 606667 | Mason City | 1898 |
| Humphreys | Franklin | fireplace | 578240 | Mason City | 1897 |
| Hurd | Ralph | egg case | 732413 | Mason City | 1903 |
| Last | First | Title | Patent Number | City | Year |
|---|---|---|---|---|---|
| Ikenberry | Robert | gravity bowling ball projector | 3159401 | Mason City | 1964 |
| Last | First | Title | Patent Number | City | Year |
|---|---|---|---|---|---|
| Jacobs | Frank | apparatus for hoisting and conveying boulders | 595713 | Plymouth | 1897 |
| Jergenson | Steven | Dash dock and cradle design | 9205784 | Clear Lake | 2015 |
| Jergenson | Steven | Sliding table assembly for a vehicle and related systems and methods | 9878648 | Clear Lake | 2018 |
| Jergenson | Steven | Apparatus, systems and methods relating to sliding dash assemblies | 9878677 | Clear Lake | 2018 |
| Jergenson | Steven | Sliding table system for a vehicle | 10059241 | Clear Lake | 2018 |
| Jergenson | Steven | Slidable table for a vehicle | 9371029 | Clear Lake | 2016 |
| Johnson | Merlin | towable sled for snowmobiles, boats and the like | 231516 | Clear Lake | 1974 |
| Johnson | Merlin | self-uprighting towable sled for snowmobiles and the like | 3937482 | Clear Lake | 1976 |
| Johnson | Merlin | finger-operated leverage tool | 5226849 | Meservey | 1993 |
| Jordan | Grover | lamp | 84350 | Mason City | 1931 |
| Last | First | Title | Patent Number | City | Year |
|---|---|---|---|---|---|
| Kane | Peter | variable speed gear | 810058 | Mason City | 1906 |
| Kane | Peter | starting mechanism for explosive engines | 843611 | Mason City | 1907 |
| Karl | Gustav | stock loader | 1512756 | Mason City | 1924 |
| Kastler | Richard | underdrain for filter tanks | 3247971 | Mason City | 1966 |
| Kearns | Keith | golf tee marker | 444198 | Clear Lake | 2001 |
| Kebeli | Hasan | bracket for connecting roof rafters to corrugated bin sidewalls | 7024825 | Mason City | 2006 |
| Kehm | William | grain separator | 407956 | Mason City | 1889 |
| Kehm | William | draft evener | 508023 | Portland | 1893 |
| Kehm | Frank | thill coupling | 601796 | Mason City | 1898 |
| Kehm | Phillip | thill coupling | 601796 | Mason City | 1898 |
| Kelly | James | operating mechanism for washing machines | 1138487 | Mason City | 1915 |
| Kelly | Mike | juice extractor | 1532525 | Mason City | 1925 |
| Kennedy | Samuel | cultivator | 1689243 | Clear Lake | 1928 |
| Khan | Mohammed | preparation of non-alkali chlorates | 5948380 | Clear Lake | 1999 |
| Khan | Mohammed | chloro-hydrogenation of sodium sulfate and other alkali-metal sulfates | 6190636 | Clear Lake | 2001 |
| Khan | Mohammed | production of chlorine dioxide by chemical reduction of ammonium chlorate in aqueous acidic solution | 6287533 | Clear Lake | 2001 |
| Khan | Mohammed | chemical preparation of chlorate salts | 6616907 | Clear Lake | 2003 |
| Kindschuh | Dennis | intrinsically safe battery circuit | 4749934 | Mason City | 1988 |
| Kindschuh | Dennis | method and apparatus for charging a nickel-cadmium battery | 4806840 | Mason City | 1989 |
| Kindschuh | Dennis | method and apparatus for measuring the voltage and charge of a battery | 5144248 | Mason City | 1992 |
| Kindschuh | Dennis | battery charger | 337985 | Mason City | 1993 |
| Kindschuh | Dennis | battery maintenance system | 5196779 | Mason City | 1993 |
| Kindschuh | Dennis | method and apparatus for measuring the voltage and charge of a battery | 5315253 | Mason City | 1994 |
| Kirkham | Lindsay | electrocardiographic switching system | 3343528 | Mason City | 1967 |
| Kiroff | Sheldon | Piston actuating engine for combusting fuel | 7909011 | Mason City | 2011 |
| Kirsten | Frederick | loose leaf binder | 1555858 | Mason City | 1925 |
| Kirsten | Frederick | soft collar support | 1764212 | Mason City | 1930 |
| Klatt | Harold | blade sharpening device | 2993312 | Clear Lake | 1961 |
| Kline | Lyle | combination ice fishing hole maintaining and bait storage device | 5419073 | Clear Lake | 1995 |
| Kluger | Earl | electric retouching pencil | 1352976 | Clear Lake | 1920 |
| Koch | James | disposable smoke mask and apparatus | 4565196 | Mason City | 1986 |
| Koch | Matthew | Moisture sensing device for grain handling | 9719974 | Clear Lake | 2017 |
| Koehler | Matthew | Bin washing system | 8997763 | Meservey | 2015 |
| Koehler | Matthew | Friction driven beltless grain spreader | 10302177 | Meservey | 2019 |
| Koerber | Mary | paper boy collection bag | 223315 | Mason City | 1972 |
| Kogle | William | hot water heater | 935117 | Mason City | 1909 |
| Kolker | Joel | Apparatus to reliably locate pull-type implement according to a localizing signal | 9913422 | Clear Lake | 2018 |
| Kopecky | John | bank check | 1344235 | Mason City | 1920 |
| Kopecky | John | change handling device | 1372356 | Mason City | 1921 |
| Koser | Edward | filter | 2073991 | Mason City | 1937 |
| Kramer | Henry | cellular box | 2322239 | Mason City | 1943 |
| Kramer | Dean | pitless well adapter | 3556213 | Mason City | 1971 |
| Kramer | Dean | pitless well adaptor | 3782462 | Mason City | 1974 |
| Kramer | Dean | pitless well adapter | 3847217 | Mason City | 1974 |
| Kramer | Dean | wire guard device for wells | 4483395 | Mason City | 1984 |
| Kramer | Dean | quick disconnect coupling device | 4564041 | Mason City | 1986 |
| Kramer | Dean | quick disconnect for sewage system | 4702274 | Mason City | 1987 |
| Krein | Reuben | sliding closure assembly | 3900964 | Clear Lake | 1975 |
| Krieger | George | pneumatic tire pressure control | 2008455 | Mason City | 1935 |
| Krieger | Carl | combined fruit reamer and strainer | 150990 | Mason City | 1948 |
| Krieger | Carl | combined fruit reamer and strainer | 2486423 | Mason City | 1949 |
| Krivohlany | Louis | torpedo | 1217016 | Mason City | 1917 |
| Krogh | Steve | intravenous bandage | 5707348 | Mason City | 1998 |
| Krueger | Lewis | indicator card scaling rule | 1215663 | Mason City | 1917 |
| Krueger | Henry | animal restraining device | 2582339 | Clear Lake | 1952 |
| Kruger | Aaron | Ultrasonic meter flow measurement monitoring system | 9581479 | Thornton | 2017 |
| Kugler | James | electric retouching pencil | 1352976 | Clear Lake | 1920 |
| Kuhl | Larry | body supported resilient exercise apparatus | 4911439 | Mason City | 1990 |
| Kupka | Edward | toy | 2232615 | Mason City | 1941 |
| Last | First | Title | Patent Number | City | Year |
|---|---|---|---|---|---|
| Lamb | John | water delivering apparatus | 1008830 | Mason City | 1911 |
| Larson | Carl | combination bevel, square and saw | 1277433 | Mason City | 1918 |
| Larson | Jack | use of non-adhesive materials as stencil copy, and the method of retaining same to the screen in screen process printing | 2929315 | Mason City | 1960 |
| Larson | Jack | weighted whirling loopanchor coated regenerated cellulose film | 3528654 | Mason City | 1970 |
| Laudner | Wilbert | heating system | 4007874 | Rockwell | 1977 |
| Leake | George | phonograph record | 1303074 | Mason City | 1919 |
| Leake | George | transom lift | 1460023 | Mason City | 1923 |
| Lepper | John | electrical vaporizer | 1222425 | Mason City | 1917 |
| Lepper | John | heating means for carbureters | 1222426 | Mason City | 1917 |
| Lepper | John | internal combustion engine | 1230909 | Mason City | 1917 |
| Lepper | John | electrical priming vaporizer | 1297369 | Mason City | 1919 |
| Lessard | John | anatomically designed sock | 6021527 | Clear Lake | 2000 |
| Levinson | Gary | tracheal tube cuff inflation control and monitoring system | 5235973 | Mason City | 1993 |
| Lewis | Burdette | carbureter heating device | 1230619 | Mason City | 1917 |
| Lichtenberger | Loren | locking device | 3314705 | Mason City | 1967 |
| Lichter | Martha | holder for donning surgical hose | 302353 | Clear Lake | 1989 |
| Lieber | Gustav | engine mounting system | 3024758 | Mason City | 1962 |
| Lien | Andrew | limekiln | 180214 | Mason City | 1876 |
| Lighter | Charles | motor vehicle | 1093445 | Mason City | 1914 |
| Locascio | Michael | Methods and systems for treating vinasse | 10138150 | Mason City | 2018 |
| Locascio | Michael | Rotary drum screen for thin stillage filtration | 10188970 | Clear Lake | 2019 |
| Locascio | Mike | Methods and systems for forming stable particles from suspended solids produced by ethanol fermentation | 10190090 | Clear Lake | 2019 |
| Locasio | Michael | Rotary drum screen method for thin stillage filtration | 10463998 | Clear Lake | 2019 |
| Lombardo | Michele | banana shipping crate | 709166 | Mason City | 1902 |
| Lombardo | Michele | banana crate | 753410 | Mason City | 1904 |
| Lombardo | Michele | banana crate | 776666 | Mason City | 1904 |
| Lombardo | Michele | banana crate | 890668 | Mason City | 1908 |
| Lombardo | August | banana crate | 1385015 | Mason City | 1921 |
| Long | Clarence | pail bottom | 998105 | Mason City | 1911 |
| Long | Clarence | fish bait bucket | 1159399 | Mason City | 1915 |
| Long | Clarence | fish bait bucket | 1163836 | Mason City | 1915 |
| Lovell | Chris | Rotating and / or extending hand-driven tool and associated systems and methods | 10161092 | Clear Lake | 2018 |
| Lumley | Robert | Walking cane | D804163 | Mason City | 2017 |
| Lumley | Robert | Hairpin walking cane | D827290 | Mason City | 2018 |
| Lunde | Ervin | apparatus for directing the fall of stunned animals | 3191220 | Mason City | 1965 |
| Lunde | Ervin | method for directing the fall of stunned animals | 3233283 | Mason City | 1966 |
| Lundgren | Jonas | combined electric switch and fuse | 1460914 | Clear Lake | 1923 |
| Last | First | Title | Patent Number | City | Year |
|---|---|---|---|---|---|
| Maben | Duane | ribbon cable wire end forming tool | 4476905 | Clear Lake | 1984 |
| Maben | Duane | ribbon cable wire end forming tool | 4572250 | Clear Lake | 1986 |
| Mackey | John | fishing lure | 393042 | Clear Lake | 1998 |
| Mackey | Molly | fishing lure | 393042 | Clear Lake | 1998 |
| Madson | Michael | silylation of inorganic oxy-anions | 4469794 | Clear Lake | 1984 |
| Madson | Michael | Method for the extraction of starch from corn | 8143392 | Clear Lake | 2012 |
| Mahlstadt | Julius | brooder | 2312257 | Mason City | 1943 |
| Marcks | Randal | Latching device for a grain bin door | 8123260 | Mason City | 2012 |
| Maring | Oscar | refrigerating machine including energy conserving heat exchange apparatus | 4270363 | Clear Lake | 1981 |
| Martin | Guy | vanity case | 1503594 | Mason City | 1924 |
| Martin | Paul | combination bow sight | 4794702 | Mason City | 1989 |
| Masters | Lance | inflatable boat bra | 5540177 | Mason City | 1996 |
| Mataloni | Joseph | padlock | 1540488 | Mason City | 1925 |
| Mataloni | Joseph | key holder | 1571425 | Mason City | 1926 |
| McClaine | William | broom machine | 1235349 | Mason City | 1917 |
| McGowan | Harold | violin body rest | 2110023 | Mason City | 1938 |
| McGowen | Harold | crank case implement | 17613 | Mason City | 1930 |
| McLaughlin | Willson | automatic car and elevating track | 708386 | Clear Lake | 1902 |
| Mcleod | Ashlea | Helmet bag | D624751 | Mason City | 2010 |
| Mcmahon | Scott | Drop shaft | 8042877 | Clear Lake | 2011 |
| Meier | Mitchell | Moisture sensing device for grain handling | 9719974 | Mason City | 2017 |
| Meier | Mitchell | Column narrowing divider for a grain dryer | 10302359 | Mason City | 2019 |
| Melby | Phillip | golf club including rotatable grip | 4365807 | Mason City | 1982 |
| Melby | Phillip | electric body trim guard for automobiles | 4461503 | Mason City | 1984 |
| Melby | Phillip | racket for tennis and similar games | 283240 | Mason City | 1986 |
| Melby | Phillip | disposable smoke mask and apparatus | 4565196 | Mason City | 1986 |
| Melby | Phillip | game racket having adjustable string mounts | 4566695 | Mason City | 1986 |
| Melby | Phillip | snow plow apparatus with hinged side blade | 4614048 | Mason City | 1986 |
| Melby | Phillip | body stimulating mechanical jogger | 4705028 | Mason City | 1987 |
| Mennenga | Bernard | carcass holding device | 1527766 | Mason City | 1925 |
| Mennenga | Duane | apparatus and method for converting a stock trailer into a horse trailer | 6477985 | Meservey | 2002 |
| Mensch | Lee | composition railway tie and rail clamp | 927666 | Mason City | 1909 |
| Merrill | Terry | ice cube maker with new freeze and harvest control | 4733539 | Mason City | 1988 |
| Merrill | Terry | ice cube maker with new freeze and harvest control | 4938030 | Mason City | 1990 |
| Mestad | Herbert | conveyor attachment for a combine | 3672133 | Clear Lake | 1972 |
| Meyer | Michael | low profile ice dispenser | 6039220 | Clear Lake | 2000 |
| Meyer | Michael | cold plate | 6155069 | Clear Lake | 2000 |
| Meyer | Michael | soft drink dispensing machine with modular customer interface unit | 6547100 | Clear Lake | 2003 |
| Meyer | Michael | Agricultural toolbar transport system | 9010451 | Clear Lake | 2015 |
| Meyer | Michael | Agricultural toolbar transport system | 9010451 | Clear Lake | 2015 |
| Meyers | George | lawn mower sharpening machine | 2716844 | Mason City | 1955 |
| Mickalek | Arthur | hog watering trough | 2545967 | Clear Lake | 1951 |
| Mikovec | John | weighted whirling loop | 3528654 | Mason City | 1970 |
| Miles | Samuel | harvester | 246331 | Clear Lake | 1881 |
| Miles | John | roof type aerating device | 3041956 | Mason City | 1962 |
| Miles | John | aerating tube suspension unit | 3139021 | Mason City | 1964 |
| Miller | Walter | adjustable gun sight | 1428389 | Dougherty | 1922 |
| Miller | Luke | tire | 2523583 | Mason City | 1950 |
| Miller | Jay | adaptive battery charger with universal interface plate | 5818197 | Mason City | 1998 |
| Miller | David | low profile ice dispenser | 6039220 | Mason City | 2000 |
| Miller | Jay | battery adapter capable of receiving power from at least two power sources and of being in a docking station, and a battery arrangement including a battery charger and a docking station | 6177778 | Mason City | 2001 |
| Miller | James | Process for producing metal foil labels in roll form | 8888943 | Mason City | 2014 |
| Miller | Michael | Autonomous or remote-controlled vehicle platform for spraying | 10172274 | Mason City | 2019 |
| Miller | Michael | Autonomous or remote-controlled vehicle platform for planting | 10542666 | Mason City | 2020 |
| Miller | Michael | Autonomous or remote-controlled vehicle platform for spraying | 10813263 | Mason City | 2020 |
| Miner | John | remote control system for outboard | 3140689 | Clear Lake | 1964 |
| Mitchell | Edward | label and lid holder for boxes | 747997 | Mason City | 1903 |
| Moehle | Friedrich | marking instrument | 742047 | Mason City | 1903 |
| Moehle | Friedrich | marking board | 744587 | Mason City | 1903 |
| Monson | Alan | noisemaker | 509857 | Clear Lake | 2005 |
| Moore | Earl | vehicle signal | 1334779 | Mason City | 1920 |
| Moore | Arthur | attachment for machines for making clay shingles | 1931617 | Mason City | 1933 |
| Morck | Josva | centrifugal separator | 929537 | Mason City | 1909 |
| Morehouse | Ralph | locomotive whistle | 1665671 | Mason City | 1928 |
| Morgan | Alfred | milk pan cover | 173041 | Mason City | 1876 |
| Morgan | Alfred | reciprocating churn | 192449 | Mason City | 1877 |
| Moriarity | Brian | log splitter | 4328845 | Mason City | 1982 |
| Morris | Carl | railroad mowing machine | 1783517 | Thornton | 1930 |
| Morrison | Horatio | hen's nest | 191166 | Mason City | 1877 |
| Morrison | Horatio | stove pipe safe and register | 192181 | Mason City | 1877 |
| Morrison | Horatio | stove pipe safe and register | 212968 | Mason City | 1879 |
| Morrison | Horatio | stove pipe thimble | 216097 | Mason City | 1879 |
| Morwood | Robert | necktie and method of tying | 4696064 | Mason City | 1987 |
| Muller | Steven | life preserver | 1324514 | Mason City | 1919 |
| Murphy | Frank | eye glass lens | 63193 | Mason City | 1923 |
| Murphy | David | adjustable lamp carrier | 2629813 | Mason City | 1953 |
| Murphy | David | boat lifting device | 2934220 | Mason City | 1960 |
| Murphy | David | grain circulating apparatus | 3251582 | Mason City | 1966 |
| Murphy | David | grain stirring device | 3580549 | Mason City | 1971 |
| Murphy | David | electric vibrator | 3584249 | Mason City | 1971 |
| Murphy | David | grain stirring apparatus | 3693944 | Mason City | 1972 |
| Murphy | David | gear motor | 3774477 | Mason City | 1973 |
| Murphy | David | house trailer hook-up | 3825089 | Mason City | 1974 |
| Myers | Scott | cream cooler | 2089403 | Dougherty | 1937 |
| Last | First | Title | Patent Number | City | Year |
|---|---|---|---|---|---|
| Naylor | Joseph | cattle leading ring | 1472883 | Clear Lake | 1923 |
| Nelson | Hanson | running-gear for wagons | 305468 | Clear Lake | 1884 |
| Nelson | Frank | conveyer | 755526 | Burchinal | 1904 |
| Nelson | Frank | loading device | 778699 | Burchinal | 1904 |
| Nelson | Andrew | guide means for brick cutting machines | 1164846 | Mason City | 1915 |
| Nelson | Andrew | order holder for film hangers | 1464157 | Mason City | 1923 |
| Nelson | Ernest | corn crib construction | 1646308 | Burchinal | 1927 |
| Nelson | Ryan | optical connector | 6899464 | Clear Lake | 2005 |
| Nelson | Andrew | High performance acoustical wood door | 9816313 | Mason City | 2017 |
| Newman | Karel | dna encoding an antigenic protein derived from eimeria tenella and vaccinesfor prevention of coccidiosis caused by eimeria tenella | 4874705 | Clear Lake | 1989 |
| Nicholson | Brandon | Tabbed nameplate on a ring | 9792840 | Mason City | 2017 |
| Nielsen | Ole | roof scaffolding bracket | 1148919 | Thornton | 1915 |
| Nielsen | Franklin | hook for hanging plastic vent pipes | 371303 | Thornton | 1996 |
| Nieman | David | brush for cleaning electrical connectors | 363376 | Ventura | 1995 |
| Nieman | David | electrical tester for trailer connection | 363890 | Ventura | 1995 |
| Noel | Adolphus | door controlling device | 944494 | Mason City | 1909 |
| Norris | John | shingle rebaling machine | 1346241 | Mason City | 1920 |
| Last | First | Title | Patent Number | City | Year |
|---|---|---|---|---|---|
| O'Conner | Frank | store fixture | 1389973 | Mason City | 1921 |
| O'Connor | Frank | store fixture | 1524748 | Mason City | 1925 |
| O'Donnell | David | head lamp shade for motor vehicles | 1177535 | Mason City | 1916 |
| O'Harrow | Fred | pulley shield device | 1451743 | Rockwell | 1923 |
| Olden | Charles | clay gathering machine | 939855 | Mason City | 1909 |
| Olson | Harry | flag display means | 2775221 | Clear Lake | 1956 |
| Olson | Alvin | lever propelled dent removing hand tool | 2911866 | Mason City | 1959 |
| Olson | Harry | flag mounted means | 3242901 | Clear Lake | 1966 |
| Olson | Harry | flag mounting structure | 3879907 | Clear Lake | 1975 |
| Olson | Alvin | sandpaper cleaning device | 4438601 | Mason City | 1984 |
| Oshana | Aghasie | baby walking device | 1300292 | Mason City | 1919 |
| Ostendorf | Verlynn | Cribbage board game | D767039 | Clear Lake | 2016 |
| Osthus | Ramon | portable sign | 4343449 | Clear Lake | 1982 |
| Ott | Merle | funnel | 1399150 | Clear Lake | 1921 |
| Last | First | Title | Patent Number | City | Year |
|---|---|---|---|---|---|
| Page | David | hand jointer | 3437115 | Mason City | 1969 |
| Pals | Henry | stock door | 1480632 | Meservey | 1924 |
| Parrott | William | golf tee | 1708774 | Mason City | 1929 |
| Parrott | William | bait bucket | 1934815 | Mason City | 1933 |
| Paul | Henry | hose coupling | 621276 | Clear Lake | 1899 |
| Pauley | James | tuned antenna ID reader | 7106266 | Clear Lake | 2006 |
| Paulson | Lester | bean thresher | 1309910 | Clear Lake | 1919 |
| Pearsall | Jesse | shingle rebaling machine | 1346241 | Mason City | 1920 |
| Pearson | Darrell | solar heating panel | 260031 | Rock Falls | 1981 |
| Pecinovsky | Duane | Installation method for a storm door | 7661226 | Clear Lake | 2010 |
| Pedelty | Walter | vehicle axle | 1258445 | Mason City | 1918 |
| Pedelty | Walter | driving mechanism | 1258446 | Mason City | 1918 |
| Pedelty | Walter | gear casing | 1258447 | Mason City | 1918 |
| Pedelty | Walter | centrifugal fan | 1643317 | Mason City | 1927 |
| Pedelty | Walter | pulverizing process and apparatus | 1783975 | Mason City | 1930 |
| Pedelty | Walter | pulverizing process and apparatus | 19049 | Mason City | 1934 |
| PeltonJr. | Howard | Computer gaming station | 7908978 | Clear Lake | 2011 |
| Penney | Clarence | ice spur | 2618079 | Mason City | 1952 |
| Penney | Clarence | ice spur | 2718716 | Mason City | 1955 |
| Perkins | Dowd | condensation eliminator for flush tanks | 2808211 | Mason City | 1957 |
| Perkins | John | method of soil erosion control | 3299567 | Clear Lake | 1967 |
| Petersen | Peter | interior and exterior fastening means for sliding doors | 2799153 | Clear Lake | 1957 |
| Petersen | Peter | latch mechanism | 2821423 | Clear Lake | 1958 |
| Peterson | Leslie | pivotal locking device | 3453925 | Mason City | 1969 |
| Peterson | William | battery charger | 337985 | Mason City | 1993 |
| Peterson | William | battery housing for a portable radio telephone | 344926 | Mason City | 1994 |
| Peterson | William | battery housing for a portable radio telephone | 348044 | Mason City | 1994 |
| Peterson | William | cellular telephone battery | 349093 | Mason City | 1994 |
| Peterson | William | battery housing for a communication transceiver | 349094 | Mason City | 1994 |
| Peterson | William | cellular telephone battery | 350328 | Mason City | 1994 |
| Peterson | William | personal battery charger | 350330 | Mason City | 1994 |
| Peterson | William | cellular telephone battery | 352269 | Mason City | 1994 |
| Peterson | William | battery housing for a communications transceiver | 355158 | Mason City | 1995 |
| Peterson | William | battery housing for a portable radio telephone | 356065 | Mason City | 1995 |
| Petterson | Swan | fence post | 117047 | Clear Lake | 1939 |
| Phalen | Daniel | emergency draw bar | 1075437 | Mason City | 1913 |
| Photiades | Nicholas | circuit for prosetting the magnetic state of a magnetic oscillator | 3237128 | Mason City | 1966 |
| Pliley | Robert | seamless siding system and method | 6122878 | Ventura | 2000 |
| Pool | Hardy | soldering device | 860569 | Mason City | 1907 |
| Pool | Hardy | cotton picker | 2208731 | Mason City | 1940 |
| Poppock | Mack | square | 1725476 | Mason City | 1929 |
| Post | Bernard | golf cart | 205763 | Clear Lake | 1966 |
| Pramer | Philip | device for forming heel calks on horseshoes | 572125 | Clear Lake | 1896 |
| Preston | Elias | open potential circuit detector | 1569299 | Mason City | 1926 |
| Prilipp | Willie | governor mechanism for explosive engines | 1054985 | Meservey | 1913 |
| Prilipp | William | tractor drawbar | 1542581 | Meservey | 1925 |
| Prilipp | William | radius rod connection | 1554520 | Meservey | 1925 |
| Pushee | Charles | foot scraper | 286329 | Mason City | 1883 |
| Putter | Robert | ice cube maker with new freeze and harvest control | 4938030 | Mason City | 1990 |
| Last | First | Title | Patent Number | City | Year |
|---|---|---|---|---|---|
| Quackenbush | Rena | toilet or water closet seat cover | 1088090 | Mason City | 1914 |
| Last | First | Title | Patent Number | City | Year |
|---|---|---|---|---|---|
| Randall | Elisha | lime kiln | 129985 | Mason City | 1872 |
| Ransom | Donald | debris gathering means | 3627051 | Ventura | 1971 |
| Rattay | Thomas | hollow doorframe including electroluminescent illumination system | 7125136 | Mason City | 2006 |
| Rice | William | air valve | 812451 | Mason City | 1906 |
| Riefe | Henry | mattress making machine | 578466 | Mason City | 1897 |
| Ritten | Louis | combined funnel and measure | 987826 | Mason City | 1911 |
| Ritter | Bob | Dash dock and cradle design | 9205784 | Clear Lake | 2015 |
| Ritter | Bob | Apparatus, systems and methods relating to sliding dash assemblies | 9878677 | Clear Lake | 2018 |
| Roach | Larry | cleaning and deburring of machined or cast parts | 4716684 | Mason City | 1988 |
| Robertson | Sylvia | dress or frock | 57727 | Clear Lake | 1921 |
| Roderick | Dennis | belt thrower | 904648 | Mason City | 1908 |
| Rohlfsen | William | Method and formulation for eliminating moss with oregano oil | 8309492 | Mason City | 2012 |
| Rohlfsen | William | Method for cultivation of Monarda fistulosa | 9029610 | Mason City | 2015 |
| Rohlfsen | William | Method for cultivation of Monarda fistulosa for production of thymoquinone | 9073824 | Mason City | 2015 |
| Rohlfsen | William | Method for cultivation of Monarda fistulosa for production of thymoquinone | 9776939 | Mason City | 2017 |
| Rohlfsen | William | Method for cultivation of Monarda fistulosa for production of thymoquinone | 10526265 | Mason City | 2020 |
| Roney | Grant | veterinary instrument | 1556355 | Swaledale | 1925 |
| Roney | Grant | veterinary forceps | 1649368 | Swaledale | 1927 |
| Roney | George | clamp type animal restraining device | 3186380 | Swaledale | 1965 |
| Rounds | Harley | roller reduction machine for flour mills | 271742 | Clear Lake | 1883 |
| Rozendaal | Douglas | Pedal-operated stringed musical instrument actuator apparatus | 9135896 | Clear Lake | 2015 |
| Last | First | Title | Patent Number | City | Year |
|---|---|---|---|---|---|
| Sabo | Stosch | Composite sandwich panels for oilfield valve | 10337627 | Mason City | 2019 |
| Sahr | Arnold | container | 343352 | Mason City | 1994 |
| Sammis | George | method for printing a color design on a release paper for heat transfer to a fabric material | 4038123 | Mason City | 1977 |
| Sammis | George | transfer sheet with abrasive particles for personally colored designs | 5419944 | Mason City | 1995 |
| Sammis | George | transfer sheet for personally colored designs | 6120635 | Mason City | 2000 |
| Sammis | George | transfer sheet with abrasive particles for personally colored designs | 6143115 | Mason City | 2000 |
| Sampson | William | seat for locomotive engines | 613479 | Mason City | 1898 |
| Sarb | Kevin | means and method for growing plants indoors | 5224293 | Mason City | 1993 |
| Schlobohm | Otto | steering mechanism for agricultural machines | 1965991 | Falls Township | 1934 |
| Schmale | Henry | hydraulically actuated tractor scraper | 2729901 | Thornton | 1956 |
| Schmale | Henry | feed and grain mixing machine | 2815941 | Thornton | 1957 |
| Schmale | Robert | adhesively bonded tool cabinet and method of assembly thereof | 5246286 | Clear Lake | 1993 |
| Schmitz | Vincent | plow colter | 3351139 | Clear Lake | 1967 |
| Schmitz | Vincent | plow colter | 3601201 | Clear Lake | 1971 |
| Schmitz | James | debris gathering means | 3627051 | Ventura | 1971 |
| Schmitz | James | stump pulling implement | 3815266 | Ventura | 1974 |
| Schmitz | Vincent | method of repairing one-way clutch drive assemblies | 4272876 | Clear Lake | 1981 |
| Schmoll | Frank | lawn mower sharpener | 1500898 | Clear Lake | 1924 |
| Schneider | Albert | apparatus for freezing ice cream and similar mixes | 2027203 | Clear Lake | 1936 |
| Schneider | Kenneth | refrigerating machine including energy conserving heat exchange apparatus | 4270363 | Mason City | 1981 |
| Schneider | Kenneth | beverage cooler having a cold plate and plastic ice bin | 4651538 | Mason City | 1987 |
| Schneider | Kenneth | ice cube maker with new freeze and harvest control | 4733539 | Mason City | 1988 |
| Schneider | Kenneth | apparatus and method of dispensing particulate ice and cold beverage with irreversible separation of cooling ice | 4803850 | Mason City | 1989 |
| Schneider | Kenneth | thermo plastic carbonated water manifold and method of making same | 4913183 | Mason City | 1990 |
| Schneider | Kenneth | ice cube maker with new freeze and harvest control | 4938030 | Mason City | 1990 |
| Schneider | Kenneth | method and apparatus for dispensing cold beverage | 4969576 | Mason City | 1990 |
| Schneider | Kenneth | ice cube maker with new freeze and harvest control | 5056325 | Mason City | 1991 |
| Schneider | Kenneth | method and apparatus for dispensing cold beverage | 5115942 | Mason City | 1992 |
| Schneider | Kenneth | thermoplastic water manifold and method of making same | 5125431 | Mason City | 1992 |
| Schroeder | Fred | rendering animal fats | 2443274 | Mason City | 1948 |
| Schroeder | Matthew | Drop shaft | 8042877 | Ventura | 2011 |
| Schroeder | Matthew | Container carrier | 8297904 | Ventura | 2012 |
| Schroeder | Matthew | Boom with two-block sensing system | 8863965 | Ventura | 2014 |
| Schroeder | Matthew | Bin washing system | 8997763 | Ventura | 2015 |
| Schroeder | Matthew | Control system | 9649968 | Ventura | 2017 |
| Schroeder | Matthew | Side pack with channels | 10179547 | Ventura | 2019 |
| Schroeder | Matthew | Lightweight crane | 10894699 | Ventura | 2021 |
| Schuchart | Ryan | cold plate | 6155069 | Mason City | 2000 |
| Schuchart | Ryan | soft drink dispensing machine with modular customer interface unit | 6547100 | Mason City | 2003 |
| Schultz | Magnus | collapsible box | 1938225 | Mason City | 1933 |
| Schultz | Alfred | hog farrowing house | 3172392 | Clear Lake | 1965 |
| Seemann | George | rail joint | 912495 | Rockwell | 1909 |
| Shipley | James | Foldable clip | 9664217 | Mason City | 2017 |
| Shmelstein | Isaac | top for bicycles and motor cycles | 1254858 | Mason City | 1918 |
| Skuttle | John | automatic water control for furnace air moisteners | 1150709 | Mason City | 1915 |
| Skuttle | John | float valve | 1368364 | Mason City | 1921 |
| Skuttle | John | gas heater | 1384493 | Mason City | 1921 |
| Skuttle | John | furnace radiator cleaner | 1584481 | Mason City | 1926 |
| Skuttle | John | automatic water control valve | 1686296 | Mason City | 1928 |
| Skuttle | John | pipe tap | 1791385 | Mason City | 1931 |
| Skuttle | John | water supply regulator for humidifiers | 1952000 | Mason City | 1934 |
| Skuttle | John | flush valve mechanism | 1982550 | Mason City | 1934 |
| Skuttle | John | valve attachment for humidifier pans | 2052850 | Mason City | 1936 |
| Smith | Andrew | beet and potato harvester | 1206152 | Mason City | 1916 |
| Smith | Sam | device for distributing and packing cosettes in diffusion battery cells | 1895185 | Mason City | 1933 |
| Smith | Charles | electric bulb pliers | 1983411 | Mason City | 1934 |
| Smith | Clarence | bar hanger | 2313594 | Mason City | 1943 |
| Smith | Clarence | float valve | 2433166 | Mason City | 1947 |
| Sosso | Peter | display deck for a temperature controlled case | 7357000 | Mason City | 2008 |
| Sparks | John | chair swing | 1339296 | Clear Lake | 1920 |
| Sprague | David | grinding mill | 563988 | Clear Lake | 1896 |
| Sprague | David | inhaler | 801555 | Clear Lake | 1905 |
| Springer | Ernest | machine for tamping railway ties | 727013 | Mason City | 1903 |
| Springer | Ernest | apparatus for sharpening mowers | 797873 | Mason City | 1905 |
| Springer | Ernest | apparatus for sharpening lawn mowers | 850071 | Mason City | 1907 |
| Stanfield | Harry | fish holding device | 1962570 | Mason City | 1934 |
| Starr | Marion | combined hot water bottle and syringe | 1157439 | Mason City | 1915 |
| Stecker | Aldin | fireplace protection pad | 4867135 | Mason City | 1989 |
| Steil | Peter | blower for thrashing machines | 1605995 | Mason City | 1926 |
| Stevens | John | shoe heel | 1347883 | Mason City | 1920 |
| Stevenson | John | end gate rod | 1383168 | Mason City | 1921 |
| Stevenson | Edward | bed table | 1497605 | Mason City | 1924 |
| Stewart | Tyler | shoe tree | 2556637 | Mason City | 1951 |
| Stewart | Tyler | foot exercising appliance | 3088458 | Mason City | 1963 |
| Stille | Troy | Portable safety device container | 10486895 | Mason City | 2019 |
| Storer | Andrew | band cutter | 414457 | Mason City | 1889 |
| Storer | Willis | archery bow with force multiplying linkage | 3595213 | Mason City | 1971 |
| Storms | Bernard | nut lock | 1371946 | Mason City | 1921 |
| Strickler | Oliver | carbureter heating device | 1230619 | Mason City | 1917 |
| Stuessy | Verne | cement kiln having tire injection system | 5473998 | Mason City | 1995 |
| Suby | Duard | debris gathering means | 3627051 | Clear Lake | 1971 |
| Sukup | Eugene | portable grain aeration device | 3198493 | Dougherty | 1965 |
| Sukup | Eugene | method and apparatus for aerating stored grain | 3272480 | Dougherty | 1966 |
| Sukup | Eugene | apparatus for heating grain or the like | 3715973 | Dougherty | 1973 |
| Sukup | Eugene | apparatus for aerating stored grain | 27931 | Dougherty | 1974 |
| Sukup | Eugene | support mounting for a grain spreader | 3902610 | Dougherty | 1975 |
| Sukup | Eugene | cable take up for traversing mechanisms | 3937308 | Dougherty | 1976 |
| Sukup | Eugene | control system for grain drying bin | 3946496 | Dougherty | 1976 |
| Sukup | Eugene | spreader for grain and like material | 3966124 | Dougherty | 1976 |
| Sukup | Eugene | grain drying systems | 4009520 | Dougherty | 1977 |
| Sukup | Eugene | rotary grain screeners | 4440637 | Dougherty | 1984 |
| Sukup | Eugene | biomass heat exchanger furnace | 4449510 | Dougherty | 1984 |
| Sukup | Eugene | ridge tillage attachment for planters | 4702323 | Dougherty | 1987 |
| Sukup | Charles | ridge tillage attachment for planters | 4702323 | Dougherty | 1987 |
| Sukup | Steven | rotary grain screener | 4919642 | Dougherty | 1990 |
| Sukup | Charles | rotary grain screener | 4919642 | Dougherty | 1990 |
| Sukup | Steven | ridge tillage attachment for planters | 4974683 | Dougherty | 1990 |
| Sukup | Steven | floor support system | 5107644 | Dougherty | 1992 |
| Sukup | Charles | floor support system | 5107644 | Dougherty | 1992 |
| Sukup | Charles | guidance system control | 5224551 | Dougherty | 1993 |
| Sukup | Steven | implement for the removal of insects or the like from plants | 5255469 | Dougherty | 1993 |
| Sukup | Charles | implement for the removal of insects or the like from plants | 5255469 | Dougherty | 1993 |
| Sukup | Charles | axial fan housing with integral venturi | 5615999 | Dougherty | 1997 |
| Sukup | Charles | sweep auger | 6254329 | Dougherty | 2001 |
| Sukup | Steven | flashing apron for grain bins | 6698143 | Dougherty | 2004 |
| Sukup | Steven | mounting bracket for grain bin | 6941712 | Dougherty | 2005 |
| Sukup | Charles | Grain bin roof ring mounting bracket | 7654048 | Dougherty | 2010 |
| Sukup | Charles | Latching device for a grain bin door | 8123260 | Dougherty | 2012 |
| Sukup | Steven | Support for a grain bin floor and method of making the same | 8297016 | Clear Lake | 2012 |
| Sukup | Charles | Support for a grain bin floor and method of making the same | 8297016 | Dougherty | 2012 |
| Sukup | Steven | Stiffener and base assembly for a grain bin | 8516769 | Clear Lake | 2013 |
| Sukup | Steven | Dwelling assembly | 8646221 | Clear Lake | 2014 |
| Sukup | Charles | Dwelling assembly | 8646221 | Dougherty | 2014 |
| Sukup | Steven | Support for a grain bin floor and method of making the same | 8950231 | Clear Lake | 2015 |
| Sukup | Charles | Support for a grain bin floor and method of making the same | 8950231 | Dougherty | 2015 |
| Sukup | Charles | Sump clearing device | 8967936 | Dougherty | 2015 |
| Sukup | Steven | Support for a grain bin floor and method of making the same | 9132461 | Clear Lake | 2015 |
| Sukup | Charles | Support for a grain bin floor and method of making the same | 9132461 | Dougherty | 2015 |
| Sukup | Steven | Vent assembly for a grain bin | D788904 | Clear Lake | 2017 |
| Sukup | Charles | Vent assembly for a grain bin | D788904 | Dougherty | 2017 |
| Sukup | Charles | Delay system for a stirring machine | 9931599 | Dougherty | 2018 |
| Sukup | Steven | Dwelling assembly | 10301811 | Clear Lake | 2019 |
| Sukup | Charles | Dwelling assembly | 10301811 | Dougherty | 2019 |
| Sukup | Charles | Paddle sweep | 10377573 | Dougherty | 2019 |
| Sukup | Charles | Intermediate sump warning system | 10423134 | Dougherty | 2019 |
| Sukup | Charles | Paddle sweep | 10836582 | Dougherty | 2020 |
| Swehla | Louis | valve regulator | 1519640 | Mason City | 1924 |
| Sybesma | Daryl | cheek plate for milling apparatus | 5102058 | Clear Lake | 1992 |
| Sylvester | Edward | harness head gear | 569526 | Thornton | 1896 |
| Symes | George | railway construction | 1052983 | Mason City | 1913 |
| Last | First | Title | Patent Number | City | Year |
|---|---|---|---|---|---|
| Tanner | Albert | block mold | 1235858 | Mason City | 1917 |
| Tanner | Albert | block mold | 1355185 | Mason City | 1920 |
| Temple | Willard | apparatus for printing in colors | 1041193 | Mason City | 1912 |
| Temple | Willard | method of making watermarked stationery | 1479337 | Mason City | 1924 |
| Tenney | Charles | carbureter | 670599 | Mason City | 1901 |
| Tenney | Charles | carbureter | 714414 | Mason City | 1902 |
| Tenney | Charles | apparatus for purifying gas | 743591 | Mason City | 1903 |
| Tenney | Charles | boiler for gas making systems | 900230 | Mason City | 1908 |
| Tenney | Charles | gas generator | 900231 | Mason City | 1908 |
| Theilen | Jerry | Device for mounting wall objects | 10251495 | Mason City | 2019 |
| Theissen | Robert | substituted phenoxybenzoic acids and derivative thereof as herbicides | 4606758 | Mason City | 1986 |
| Thomas | Andrew | Christmas tree stand | 2189687 | Mason City | 1940 |
| Thomas | Walter | sectional duct means having a fan for removing air from an enclosure | 2433544 | Mason City | 1947 |
| Thomas | Walter | drying and dehumidifying means for corn cribs and the like | 2466362 | Mason City | 1949 |
| Thomas | Walter | droppings catcher | 2484927 | Mason City | 1949 |
| Thomas | Walter | building ventilator having air inlets and outlets | 2489515 | Mason City | 1949 |
| Thomas | Lawrence | Christmas tree stand | 3025029 | Mason City | 1962 |
| Thomasson | Hiram | spark plug | 1107634 | Portland | 1914 |
| Thompson | Addison | combined whip socket and rein holder | 405133 | Clear Lake | 1889 |
| Thurston | Daniel | rotary engine | 680252 | Plymouth | 1901 |
| Thurston | Daniel | grain packer for harvesting binders | 706362 | Plymouth | 1902 |
| Tomes | Ivan | suspension clamp | 1536361 | Mason City | 1925 |
| Tree | Daniel | corn husker | 943051 | Cartersville | 1909 |
| Last | First | Title | Patent Number | City | Year |
|---|---|---|---|---|---|
| Utter | Robert | ice cube maker with new freeze and harvest control | 4733539 | Mason City | 1988 |
| Utter | Robert | ice cube maker with new freeze and harvest control | 5056325 | Mason City | 1991 |
| Utter | Robert | ice cube maker with new freeze and harvest control | 5056325 | Mason City | 1991 |
| Last | First | Title | Patent Number | City | Year |
|---|---|---|---|---|---|
| Vegors | Stanley | contact lens polishing apparatus | 3111790 | Mason City | 1963 |
| Vegors | Stanley | projection apparatus for use in testing | 3111881 | Mason City | 1963 |
| Vegors | Stanley | contact lens contouring and polishing machine | 3145506 | Mason City | 1964 |
| Verney | William | pneumatic chest for pipe organs | 879503 | Mason City | 1908 |
| Vickers | Richard | material loading and transferring vehicle with overhead power cable | 3136435 | Mason City | 1964 |
| Vickers | Richard | insulated electric cable and reel assembly | 3167160 | Mason City | 1965 |
| Villeponteaux | George | process and apparatus for spot-welding a flexible welding board to a battery cell | 5223690 | Mason City | 1993 |
| Villeponteaux | George | method for making a battery pack | 5761792 | Mason City | 1998 |
| Voortmann | Jeramy | Boom with two-block sensing system | 8863965 | Clear Lake | 2014 |
| Voortmann | Jeramy | Lightweight crane | 10894699 | Clear Lake | 2021 |
| Vosburgh | Orvil | clutch pedal lock for tractors | 1496039 | Rockwell | 1924 |
| Last | First | Title | Patent Number | City | Year |
|---|---|---|---|---|---|
| Walch | Herman | air brake coupling | 1012770 | Mason City | 1911 |
| Walch | William | mixing device | 1170788 | Rockwell | 1916 |
| Wall | Bert | drawer mounting | 1252867 | Mason City | 1918 |
| Walsh | John | rotary bolt | 398478 | Mason City | 1889 |
| Walsh | John | rotary bolt | 410661 | Mason City | 1889 |
| Wamre | David | storm door with counterbalance | 6640869 | Clear Lake | 2003 |
| Washburn | Roy | circuit closer | 1199843 | Mason City | 1916 |
| Waterbury | Emery | extension rule | 144003 | Mason City | 1873 |
| Waterbury | Milan | lamp extinguisher | 162593 | Mason City | 1875 |
| Waterbury | Emery | game counter | 176452 | Mason City | 1876 |
| Waterbury | Emery | measuring rule | 183608 | Mason City | 1876 |
| Waterbury | Milan | portable heater | 186911 | Mason City | 1877 |
| Waterbury | Milan | portable heater | 186911 | Mason City | 1877 |
| Waughtal | George | harrow | 357254 | Mason City | 1887 |
| Webster | George | railway track weed cutter | 1238855 | Mason City | 1917 |
| Wedein | August | shoe heel | 1347883 | Mason City | 1920 |
| Wedeking | Lorenz | stock oiler | 2438731 | Clear Lake | 1948 |
| Weigle | Charles | hame tug clip | 563631 | Mason City | 1896 |
| Weiss | Steven | Method of feeding livestock to improve carcass characteristics | 9538774 | Mason City | 2017 |
| Wellman | Seth | collapsible core | 955235 | Swaledale | 1910 |
| Wellman | Seth | machine for tying valve sacks | 1229361 | Mason City | 1917 |
| Wellman | Seth | ventilating means | 1335948 | Mason City | 1920 |
| Wellman | Seth | carcass holding device | 1527766 | Mason City | 1925 |
| Wellman | Seth | gate latch | 1542198 | Mason City | 1925 |
| Wendel | Albert | tractor attachment | 2099637 | Meservey | 1937 |
| Wercely | Elic | internal combustion engine | 1615895 | Mason City | 1927 |
| Westcott | Richard | painter's accessory | 4225064 | Clear Lake | 1980 |
| White | Fred | inside tire cord patch | 1513204 | Mason City | 1924 |
| White | Fred | brush | 1918440 | Mason City | 1933 |
| Wilcox | Howard | fencepost | 1609795 | Mason City | 1926 |
| Wiley | Donald | ice maker harvest control and method | 6405546 | Mason City | 2002 |
| Wiley | Donald | ice maker control | 6612118 | Mason City | 2003 |
| Wiley | Donald | ice maker harvest control and method | 6705090 | Mason City | 2004 |
| Wiley | Donald | combined ice and beverage dispenser and icemaker | 7104085 | Mason City | 2006 |
| Wiley | Donald | combined ice and beverage dispenser and icemaker | 7269960 | Mason City | 2007 |
| Wilkinson | Charles | shelf or the like | 134046 | Mason City | 1942 |
| Wilson | William | fireproof building wall | 1171913 | Mason City | 1916 |
| Wilson | William | fireproof building wall | 14414 | Mason City | 1917 |
| Wilson | William | wall construction | 1234990 | Mason City | 1917 |
| Wilson | William | wall construction | 1350399 | Mason City | 1920 |
| Wilson | William | clay product facing machine | 1417788 | Mason City | 1922 |
| Wilson | William | curved palette and palette table | 1489473 | Mason City | 1924 |
| Wilson | William | kiln | 1513778 | Mason City | 1924 |
| Wilson | William | door construction | 1521921 | Mason City | 1925 |
| Wilson | William | tile | 1521922 | Mason City | 1925 |
| Wilson | William | method of and apparatus for drying refractory materials | 1570659 | Mason City | 1926 |
| Wilson | William | tile and tile arch | 1585003 | Mason City | 1926 |
| Wilson | William | tunnel kiln | 1590462 | Mason City | 1926 |
| Wilson | William | tunnel kiln | 1591599 | Mason City | 1926 |
| Wilson | William | single fire box kiln | 1627720 | Mason City | 1927 |
| Wilson | William | tunnel kiln fire box | 1662912 | Mason City | 1928 |
| Winston | Harold | hay baler aerator | 5301607 | Mason City | 1994 |
| Winston | Harold | hay baler aerator | 5391021 | Mason City | 1995 |
| Winston | Harold | hay baler aerator | 5540143 | Mason City | 1996 |
| Winter | Leon | fish lure | 1832172 | Mason City | 1931 |
| Winter | Leon | fish lure | 2235597 | Mason City | 1941 |
| Wireman | Homer | hardsurfacing material for engine components and method for depositing same | 5293026 | Ventura | 1994 |
| Wise | Mack | watering device | 2154152 | Rockwell | 1939 |
| Wisman | Theodore | Multi-function high voltage wire service handtool | 9083160 | Mason City | 2015 |
| Wisman | Theodore | Wire service hand tool | D743221 | Mason City | 2015 |
| Wismer | Brad | method and means for randomly selecting a plurality of groups of numbers | 4674748 | Mason City | 1987 |
| Wood | Charles | straw stacker | 790239 | Rockwell | 1905 |
| Wood | Everett | vapor condensing device | 2074350 | Mason City | 1937 |
| Woodland | Jeremy | Foldable clip | 9664217 | Ventura | 2017 |
| Worden | Daniel | Heating control system using a fluid level sensor and a heating control element | 8119953 | Mason City | 2012 |
| Worden | Daniel | Heating control system using a fluid level sensor and a heating control element | 8791393 | Mason City | 2014 |
| Worth | John | steam engine | 419378 | Mason City | 1890 |
| Wosniewski | Thomas | means for tuning a loaded coil antenna | 4080604 | Mason City | 1978 |
| Wrigen | Nels | strawberry vine trimmer | 811978 | Clear Lake | 1906 |
| Wright | James | physical exerciser | 323538 | Mason City | 1992 |
| Last | First | Title | Patent Number | City | Year |
|---|---|---|---|---|---|
| Yezek | Frank | posthole digger | 1464231 | Plymouth | 1923 |
| Young | Peter | tail holder for cows | 754033 | Rock Falls | 1904 |
| Young | Vincent | combination rotary lock | 1401228 | Mason City | 1921 |
| Young | Earl | awning rod holder | 1950940 | Mason City | 1934 |
| Younke | Charles | Turkey tail transporter for hunting | 7789444 | Mason City | 2010 |
| Younker | William | leakage discharge valve | 1527148 | Mason City | 1925 |
| Younker | William | juice extractor | 1532525 | Mason City | 1925 |
| Last | First | Title | Patent Number | City | Year |
|---|---|---|---|---|---|
| Zemanek | Frank | glass breaker tool | 2005487 | Mason City | 1935 |
| Zima | Albert | collar fastener | 897184 | Plymouth | 1908 |
| Zirbel | Kurt | combination backpack and seat device | 5588570 | Mason City | 1996 |
| Zrostlik | Francis | utility package including an air compressor and a tool compartment | 6065942 | Clear Lake | 2000 |
| Zrostlik | Francis | container handling system for a vehicle | 6558104 | Clear Lake | 2003 |
Source: United States Patent and Trademark Office (USPTO)
Repository: Iowa's Patent and Trademark Resource Center at the Davenport Public Library.
Transcribed for Cerro Gordo County IAGenWeb by Jennifer Gunderson (Feb 2021).
Transcribed for Cerro Gordo County IAGenWeb by Jennifer Gunderson (Feb 2021).