| Surname | Given Name | Residence | Title of Invention | Patent Number | Patent Granted |
| Addison | William D. | Manning, IA | Chain Guard for Vehicle-Wheels | US1295669A | 25 Feb 1919 |
| Addison | William D. | Manning, IA | Automobile draft controller | US1284030A | 5 Nov 1918 |
| Addison | William D. | Manning, IA | Tire chain connector | US1360859A | 30 Nov 1920 |
| Ament | James E. | Carroll, IA | Car-Coupling | US508797A | 14 Nov 1893 |
| Anderson | Louis Henry | Carroll, IA | Attachment for Automobiles | US1278556A | 10 Sep 1918 |
| Anderson | Louis T. | Carroll, IA | Combined Hook and Clasp for Horse-Collars | US364464A | 7 Jun 1887 |
| Anderson | Louis T. | Carroll, IA | Trace-Carrier | US294952A | 11 Mar 1884 |
| Arff | Hans F. | Aradia, IA | Game table | US279313A | 12 Jun 1883 |
| Ariens | Frank A. | Carroll, IA | Milk-Can-Cover Lock and Seal | US798758A | 5 Sep 1905 |
| Ayrhart | John H. | Dedham, IA | Riding and folding harrow | US607008A | 12 Jul 1898 |
| Bailey | George A. | Manning, IA | Animal Poke | US1469492A | 2 Oct 1923 |
| Bartels | George H. | Carroll, IA | Bottle Corking Machine | US988205A | 28 Mar 1911 |
| Baumhover | Frank William | Carroll, IA | Device for Protecting Ships | US1240007A | 11 Sep 1917 |
| Baumhover | Louis B. | Carroll, IA | Log-Sawing Machine | US1576025A | 9 Mar 1926 |
| Beach | Myron W. | Carroll, IA | Wire Gathering and Disbursing Machine | US306677A | 14 Oct 1884 |
| Bedell | Charles | Glidden, IA | Animal Crate and Holder | US1505186A | 19 Aug 1924 |
| Beiter | Frank | Carroll, IA | Grain-Door | US971617A | 4 Oct 1910 |
| Beiter | John | Carroll, IA | Grain-Door | US971617A | 4 Oct 1910 |
| Bell | Chester L. | Maple River Junction, IA | Weather-Strip | US238753A | 15 Mar 1881 |
| Bellinghausen | John | Carroll, IA | Corn-Planter Attachment | US1528181A | 3 Mar 1925 |
| Bellinghausen | John | Halbur, IA | Agricultural implement | US1202649A | 24 Oct 1916 |
| Beyerink | Leo Jacob | Union Twp., Carroll Co., IA | Pole-Hole Digger | US2403041A | 2 Jul 1946 |
| Bock | Cornelius F. | Templeton, IA | Harrow | US1244165A | 23 Oct 1017 |
| Bohling | Julius C. | Glidden, IA | Manure-Loader | US981052A | 10 Jan 1911 |
| Bohling | Julius C. | Glidden, IA | Walking rake | US976250A | 22 Nov 1910 |
| Bohling | William F. | Aracadia, IA | Manure-Loader | US981052A | 10 Jan 1911 |
| Bohling | William F. | Aradia, IA | Walking rake | US976250A | 22 Nov 1910 |
| Boos | Joseph B. | Carroll, IA | Suspenders | US609329A | 16 Aug 1898 |
| Bornholdt | Detlef | Aradia, IA | Game table | US279313A | 12 Jun 1883 |
| Boyce | Michael Louis | Carroll, IA | Wire-Stretcher | US651292A | 5 Jun 1900 |
| Boyce | Michael L. | Carroll, IA | Fence post | US808969A | 2 Jan 1905 |
| Boyes | Edward G. | Ralston, IA | Combined Wire-Stretcher and Wagon-Jack | US905052A | 24 Nov 1908 |
| Boyes | Edward G. | Ralston | Combined wire stretcher and wagon jack | US905052A | 24 Nov 1908 |
| Breckenridge | Edward E. | Manning, IA | Cartridge-Loader | US772865A | 18 Oct 1904 |
| Brosius | Amos P. | Carroll, IA | Machine for Repairing Vehicle-Axles | US664003A | 18 Dec 1900 |
| Bruning | Bernard N. | Breda, IA | Mail-Box Support | US1225571A | 8 May 1917 |
| Carpenter | Orrin W. | Coon Rapids, IA | Fence-Post | US800265A | 26 Sep 1905 |
| Caswell | Carl F. | Coon Rapids, IA | Glass Tongs | US1428679A | 12 Sep 1922 |
| Caswell | Carl F. | Coon Rapids, IA | Wall paper trimmer | US1524336A | 27 Jan 1925 |
| Caswell | Carl F. | Coon Rapids, IA | Device for hanging wall paper | US784985A | 14 Mar 1905 |
| Clark | Earl H. | Coon Rapids, IA | Ladder for Silos | US1176652A | 21 Mar 1916 |
| Clark | Hardy M. | Manning, IA | Steam generator | US410267A | 3 Sep 1889 |
| Colbert | Wilson | Dedham, IA | Machine for Cutting Down Trees | US1182976A | 16 May 1916 |
| Conner | Lox | Dedham, IA | Machine for Cutting Down Trees | US1182976A | 16 May 1916 |
| Conway | Richard | Carroll, IA | Gage | US560781A | 25 May 1895 |
| Conway | Richard | Carroll, IA | Design for Clapboard-Marker | No. 34568 | 28 May 1901 |
| Conway | Richard | Carroll, IA | Gage | US560781A | 25 May 1896 |
| Coryell | Joe H. | Glidden, IA | Sorghum finisher | US309029A | 9 Dec 1884 |
| Coryell | Joe H. | Glidden, IA | Fruit drier | US313810A | 10 Mar 1885 |
| Coryell | Peter D. | Glidden, IA | Orghum finisher | US309029A | 9 Dec 1884 |
| Coryell | Peter D. | Glidden, IA | Fruit drier | US313810A | 10 Mar 1885 |
| Culver | Moses M. | Glidden, IA | Wire Gathering and Disbursing Machine | US306677A | 14 Oct 1884 |
| Culver | Moses M. | Glidden, IA | Machine for Spooling and Unspooling Barbed Fence-Wire | US477185A | 14 Jun 1892 |
| Culver | Moses M. | Glidden, IA | Cultivator | US650170A | 22 May 1900 |
| Cunningham | Olie E. | Carroll, IA | Calf-Weaner | US862811A | 6 Aug 1907 |
| Danielson | Arvid A. | Manning, IA | Hitch | US1401764A | 27 Dec 1921 |
| Darr | Abraham L. | Carroll, IA | Transformable Protractor, Square, &c. | US876042A | 7 Jan 1908 |
| Darr | Abraham L. | Carroll, IA | Detachable fastener for window sashes | US702089A | 10 Jun 1902 |
| Dedrick | Freeling H. | Glidden, IA | Nut-Lock | US594861A | 7 Dec 1897 |
| Denney | Joseph W. | Manning, IA | Cultivator | US467400A | 19 Jan 1892 |
| Dillavou | Samuel A. | Ralston, IA | Corn-Husker | US833735A | 23 Oct 1906 |
| Downs | Joshua A. | Glidden, IA | Safety holdback | US808025A | 19 Dec 1905 |
| Drees | Andrew A. | Carroll, IA | Air-Brake Release Valve | US1570187A | 19 Jan 1926 |
| Drees | Andrew A. | Carroll, IA | Air-Brake Release Valve | US1577494A | 23 Mar 1926 |
| Dultimeier | Frank J. | Manning, IA | Adjustable Repair Tongue Hound | US1422681A | 11 Jul 1922 |
| Dultimeier | Frank J. | Manning, IA | Adjustable Repair Tongue Hound | US1281311A | 15 Oct 1918 |
| Dultiveier | Frank J. | Manning, IA | Collapsible Shipping-Crate | US1382178A | 21 Jun 1921 |
| Dultmeier | Frank J. | Manning, IA | Adjustable tongue holder | US1222192A | 10 Apr 1917 |
| Dultmeier | Frank J. | Manning, IA | Adjustable tongue hound | US1363503A | 28 Dec 1920 |
| Ehlert | Max Fredrick | Coon Rapids, IA | Twine-Holder | US783938A | 28 Feb 1905 |
| Eikmeier | August H. W. | near Manning, IA | Potato-Gatherer | US683737A | 1 Oct 1901 |
| Erler | August | Carroll, IA | Washing-Machine | US868172A | 15 Oct 1907 |
| Erler | August | Carroll, IA | Hinge | US868173A | 15 Oct 1907 |
| Ertz | Joe W. | Maple River Junction, IA | Corn husker | US878365A | 4 Feb 1908 |
| Fangmann | John H. | Templeton, IA | Lift for motor vehicles | US1390109A | 6 Sep 1921 |
| Ferguson | George C. | Glidden, IA | Show cover for boxes | US338943A | 30 Mar 1886 |
| Fischer | Peter | Carroll, IA | Harrow Folding Device | US1051835A | 28 Jan 1913 |
| Fischer | Henry | Manning, IA | Closure operating device | US1606621A | 9 Nov 1926 |
| Fitch | Eugene L. | Breda, IA | Thread-Case | US231027A | 10 Aug 1880 |
| Fitch | Eugene L. | Breda, IA | Thread case | US231027A | 10 Aug 1880 |
| Fort | Emma M. | Glidden, IA | Thread holder | US1272030A | 9 Jul 1918 |
| Fox | Thomas J. | Coon Rapids, IA | Disk Garden-Plow | US1253860A | 15 Jan 1918 |
| Gaynor | Lee Rambow | Coon Rapids, IA | Advertising device | US738177A | 8 Sep 1903 |
| Gilmour | Anna | Manning, IA | Pprotector for stays | US1490264A | 15 Apr 1924 |
| Gloe | John F. | Manning, IA | Loose-Leaf Binder | "US861968A
" | 30 Jul 1907 |
| Gloe | John F. | Manning, IA | Loose leaf indexed ledger | US856861A | 11 Jun 1907 |
| Goss | John | Carroll, IA | Draft-Equalizer | US1133279A | 30 Mar 1915 |
| Goss | John | Carroll, IA | Draft-Equalizer | US1120711A | 15 Dec 1914 |
| Gottchall | George A. | Manning, IA | Lid-Remover | US898574A | 15 Sep 1908 |
| Graham | Euphemia | Carroll, IA | Heating-Drum | US705921A | 29 Jul 1902 |
| Griffith | James E. | Carroll, IA | Calf-Weaner | US862811A | 6 Aug 1907 |
| Gross | John | Carroll, IA | Wagon End-Gate | "US1374297A
" | 12 Apr 1921 |
| Gross | John | Carroll, IA | Hay loader | US730453A | 9 Jun 1903 |
| Hastings | Louis E. | Manning, IA | Bracket | US354903A | 28 Dec 1886 |
| Hastings | Louis E. | Manning, IA | Wagon tongue support | US349714A | 28 Sep 1886 |
| Hastngs | Louis E. | Manning, IA | Wagon-Tongue Support | US349714A | 28 Sep 1886 |
| Hayden | Zerah L. | Carroll, IA | Hoof-Gage | US513574A | 30 Jan 1894 |
| Heider | Henry J. | Carroll, IA | Cultivator | US1529023A | 10 Mar 1925 |
| Heider | Henry J. | Carroll, IA | Tractor Plow | US1375457A | 19 Apr 1921 |
| Heider | Henry J. | Carroll, IA | Tractor Plow | US1373613A | 5 Apr 1921 |
| Heider | Henry J. | Carroll, IA | Axel-Fastening | US1292771A | 28 Jan 1919 |
| Heider | Henry J. | Carroll, IA | Coaster-Wagon | US1385946A | 26 Jul 1921 |
| Heider | Henry J. | Carroll, IA | Power Cultivator | US1546446A | 21 Jul 1925 |
| Heider | Henry J. | Carroll, IA | Draft-Equalizer | US952900A | 22 Mar 1910 |
| Heider | Henry J. | Carroll, IA | Non-Oiling Wheel | US1280460A | 1 Oct 1918 |
| Heider | Henry J. | Carroll, IA | Traction-Engine | US1055635A | 11 Mar 1913 |
| Heider | Henry J. | Carroll, IA | Draft Attachment | US989146A | 11 Apr 1911 |
| Heider | Henry J. | Carroll, IA | Transmission Mechanism | "US1154767A
" | 28 Sep 1915 |
| Heider | Henry J. | Carroll, IA | Roller-Bearing | US1451825A | 17 Apr 1923 |
| Heider | Henry J. | Carroll, IA | Stepladder | US1401470A | 27 Dec 1921 |
| Heider | Henry J. | Templeton, IA | Disk-Harrow Attachment | US677658A | 2 Jul 1901 |
| Heider | Henry J. | Carroll, IA | Draft-Equalizer | US12909 | re-issued 12 Jan 1909 |
| Heider | Henry J. | Carroll, IA | Draft-Equalizer | US781203A | 31 Jan 1905 |
| Heider | Henry J. | Templeton, IA | Draft equalizer | US697841A | 15 Apr 1902 |
| Heider | Henry J. | Carroll, IA | Tractor plow | US1373613A | 5 Apr 1921 |
| Helder | Henry J. | Carroll, IA | Coaster wagon | US1385946A | 26 Jul 1921 |
| Henry | Samuel D. | Coon Rapids, IA | Self ink distributer | US420940A | 11 Feb 1890 |
| Henshaw | James B. | Manning, IA | Steam generator | US410267A | 3 Sep 1889 |
| Herron | John W. | Coon Rapids, IA | Stock-Fountain | US590615A | 28 Sep 1897 |
| Hess | George J. | Carroll, IA | Press for Typing Up Currency | US1197824A | 12 Sep 1916 |
| Hess | George J. | Carroll, IA | Press for tying currency | US1197824A | 12 Sep 1916 |
| Heue | Joseph A. | Carroll, IA | Door and window buck | US1452116A | 17 Apr 1923 |
| Hilbert | John Aloysius | Carroll, IA | Corn Harvesting and Husking Machine | US351916A | 2 Nov 1886 |
| Hilbert | John | Carroll, IA | Corn harvesting and husking machine | US385861A | 10 Jul 1883 |
| Hilsabeck | Thara M. | Manning, IA | Cultivator | US467400A | 19 Jan 1892 |
| Hoffman | Henry | Manning, IA | Show-Case | US436135A | 9 Sep 1890 |
| Holmes | Albert | Carroll, IA | Automobile | US780798A | 24 Jan 1905 |
| Holmes | Arba | Carroll, IA | Automobile | 780798 | 24 Jan 1905 |
| Huegerich | George W. | Breda, IA | Operating-Trough | US1400486A | 13 Dec 1921 |
| Hunter | Samuel | Coon Rapids, IA | Compound for coating metallic roofing | US314584A | 31 Mar 1885 |
| Ingersoll | Franklin F. | Browning, IA | Improvement in brick kiln | US177249A | 9 May 1876 |
| Ingledue | Harvey R. | Carroll, IA | Grain-Binder | US262781A | 15 Aug 1882 |
| Irlmeier | Joseph Jr. | Templeton, IA | Tractor coupling | US1304055A | 20 May 1919 |
| Johnson | William E. | Coon Rapids, IA | Sliding door lock | US527609A | 16 Oct 1894 |
| Johnston | Floyd | Lanesboro, IA | Self-Starter | US1511082A | 7 Oct 1924 |
| Johnston | Samuel B. | Coon Rapids, IA | Compound for coating metallic roofing | US314584A | 31 Mar 1885 |
| Jump | Walter H. | Carroll, IA | Grain-Door | US971617A | 4 Oct 1910 |
| Kerlgan | Lewis J. | Breda, IA | Post hole digging machine | US969062A | 30 Aug 1910 |
| Kerns | Francis A. | Carroll, IA | Brake | US1256699A | 19 Feb 1918 |
| Kersch | Andy | Carroll, IA | Hay-Rack | US986468A | 14 Mar 1911 |
| Kettmann | Gerhard | Manning, IA | Harrow attachment for planters | US1263070A | 16 Apr 1918 |
| Kirsch | Andew | Carroll, IA | Harrow Folding Device | US1051835A | 28 Jan 1913 |
| Kirsch | Andy | Carroll, IA | Hay rack | US986468A | 14 Mar 1911 |
| Klaus | Nicholas | Breda, IA | Planter shoe | US946845A | 18 Jan 1910 |
| Klaus | Nicholas | Breda, IA | Skirt band fastening | US1227274A | 22 May 1917 |
| Kline | Opal E. | Glidden, IA | Vehicle light reflector | US1585995A | 25 May 1926 |
| Klocke | Anton | Dedham, IA | Straw spreader | US1501460A | 15 Jul 1924 |
| Kuhl | Alphons M. | Carroll, IA | Adjustable shaft | US1079865A | 15 Nov 1913 |
| LaDue | Daniel J. | Caroll City, IA | Improvement in Sash-Holders | "US129038A
" | 16 Jul 1872 |
| Langenfeld | William | Halbur, IA | Composite Musical Instrument | US561004A | 26 May 1896 |
| Lawrence | James D. | Carroll, IA | Car mover | US255639A | 28 Mar 1882 |
| Locke | Joseph D. | Benan, IA | Washing machine | US587447A | 3 Aug 1897 |
| Long | Frank H. | Manning, IA | Rod cutting harrow | US484440A | 18 Oct 1892 |
| Loxterkamp | Henry | Roselle, IA | Flexible Wrench | US771376A | 30 Apr 1904 |
| Luse | David N. | Carroll, IA | Fire Escape | US791921A | 6 Jun 1905 |
| Luse | David N. | Carroll, IA | Neck Yoke Attachment | US842791A | 29 Jan 1907 |
| Luse | David N. | Carroll, IA | Neck Yoke Attachment | US748388A | 29 Dec 1903 |
| Luse | Jesse F. | Carroll, IA | Fire Escape | US791921A | 6 Jun 1905 |
| Lyons | Arthur R. | Carroll, IA | Reversing Propeller | US1348432A | 3 Aug 1920 |
| Martin | Harry J. | Glidden, IA | Sash fastener | US1080769A | 9 Dec 1913 |
| Martin | James W. | Manning, IA | Steam feed cooker | US387525A | 7 Aug 1888 |
| Massard | Michael | Carroll, IA | Animal -Releasing Device | US1220662A | 27 Mar 1917 |
| McCormick | James | Glidden, IA | Improvement in Harness-Clamps | US178072A | 30 May 1876 |
| McCormick | James | Glidden, IA | Harness saddle tree | US189946A | 24 Apr 1877 |
| McFarland | John | Dedham, IA | Automatic Watering Trough for Animals | US538690A | 7 May 1895 |
| McFarland | John | Dedham, IA | End gate | US448249A | 17 Mar 1891 |
| Miller | Jacob E. | Coon Rapids, IA | Disk Garden-Plow | US1253860A | 15 Jan 1918 |
| Miller | Jacob Emanuel | Coon Rapids, IA | Poultry-Nest | US1222650A | 17 Apr 1917 |
| Miller | Lawrence A. | Carroll, IA | Folding-Mirror Frame | US1113034A | 6 Oct 1914 |
| Minnich | Fred H. | Dedham, IA | Coupling for Hay Rakes and Loaders | US926349A | 29 Jun 1909 |
| Mitchell | Hesekiah E. | Coon Rapids, IA | Tire | US1113036A | 6 Oct 1914 |
| Mitchell | Archie A. | Coon Rapids, IA | Seed corn stringer and hanger | US1292007A | 21 Jan 1919 |
| Molstad | Alfred | Dedham, IA | Rotary valve for explosive engines | US1326682A | 30 Dec 1919 |
| Moore | Barbara M. | Carroll, IA | Bottle Corking Machine | US988205A | 28 Mar 1911 |
| Moore | Oliver M. | Carroll, IA | Bottle Corking Machine | US988205A | 28 Mar 1911 |
| Moore | Oliver M. | Carroll, IA | Adjustable Foot-Rest | US330343A | 10 Nov 1885 |
| Moore | Oliver M. | Carroll, IA | Adjustable foot rest | US330343A | 10 Nov 1885 |
| Mosher | Oscar M. | Glidden, IA | Wire-Stretching Machine | US437612A | 30 Sep 1890 |
| Mosher | Oscar M. | Glidden, IA | Tongue-Support | US501466A | 7 Nov 1893 |
| Mott | Horace | Carroll, IA | Churn | US329762A | 3 Nov 1885 |
| Nicholson | John | Ralston, IA | Corn-Husker | US833735A | 23 Oct 1906 |
| Nickum | Isaac J. | Manning, IA | Cartridge-Loader | US772865A | 18 Oct 1904 |
| Noble | Noah Dwight | Carroll, IA | Rein-Guide | US369465A | 6 Sep 1887 |
| O'Brien | Frances | Carroll, IA | Device for Fashoning Hat-Frames | US995081A | 13 Jun 1911 |
| Ocken | John Jr. | Aradia, IA | Toothpick holder | US1162874A | 7 Dec 1915 |
| Ohde | George Jr. | Manning, IA | Cartridge-Loader | US772865A | 18 Oct 1904 |
| Ohde | George Jr. | Manning, IA | Molding-Display Cabnet | US1269208A | 11 Jun 1918 |
| Ohde | William | Manning, IA | Molding-Display Cabnet | US1269208A | 11 Jun 1918 |
| Panabaker | Peter F. | Coon Rapids, IA | Car coupling | US280949A | 10 Jul 1883 |
| Peterson | Charles | Carroll, IA | Draft equalizer | US1133179A | 23 Mar 1915 |
| Ploen | Jochim | Manning, IA | Harrow attachment for planters | US968976A | 30 Aug 1910 |
| Potthast | Walter W. | Manning, IA | Carburetor | US975635A | 15 Nov 1910 |
| Potthast | Walter H. | Manning, IA | Trap | US1521474A | 30 Dec 1924 |
| Radeleff | Charles T. | Manning, IA | Dumping truck | US1330655A | 10 Feb 1920 |
| Randall | Daniel H. | Coon Rapids, IA | Steering gear for traction engines | US918368A | 13 Apr 1909 |
| Ratclife | Walter W. | Glidden, IA | Glass Cutter | US1402961A | 10 Jun 1922 |
| Raygor | John G. | Dedham, IA | Signal for Grain-Bins | US767713A | 16 Aug 1904 |
| Reinholdt | Claus H. | Manning, IA | Steam feed cooker | US387525A | 7 Aug 1888 |
| Reynolds | James A. | Carroll, IA | Machine for Repairing Vehicle-Axles | US664003A | 18 Dec 1900 |
| Rich | Earl M. | Glidden, IA | Boot or shoe cleaner | US905583A | 1 Dec 1908 |
| Rich | Earl M. | Glidden, IA | Harrow tooth fastener | US942412A | 7 Dec 1909 |
| Riedesel | Hubert | Lanesboro, IA | Device for Removing Cups | US1511773A | 14 Oct 1924 |
| Riedesel | Hubert | Lanesboro, IA | Device for Removing Cups or Races | US1499032A | 24 Jun 1924 |
| Robeson | Oscar W. | Carroll, IA | Washing-Machine | US1022003A | 2 Apr 1912 |
| Robinson | Randolph O. | Glidden, IA | Carpet-Stretcher | US283818A | 28 Aug 1883 |
| Rohe | John Bernard | Templeton, IA | Fence-Post | US1065471A | 24 Jun 1913 |
| Rohner | Philip B. | Carroll, IA | Air-Brake Release Valve | US1570187A | 19 Jan 1926 |
| Rohner | Philip B. | Carroll, IA | Air-Brake Release Valve | US1577494A | 23 Mar 1926 |
| Rohner | Philip B. | Carroll, IA | Air brake release valve | US1577494A | 23 Mar 1926 |
| Rubey | Herbert F. | Glidden, IA | Gripper and gripper bar | US759395A | 10 May 1904 |
| Ryan | James T. | Manning, IA | Adjustable seat lift cultivator | US297933A | 29 Apr 1884 |
| Saul | William I. | Carroll, IA | Yieldable shaft coupling | US1118586A | 24 Nov 1914 |
| Scherbring | Frank H. | Aracadia, IA | Corn-Husker | US1146285A | 13 Jul 1915 |
| Scherbring | Frank H. | Aradia, IA | Husking device | US1121875A | 22 Aug 1914 |
| Schrum | George E. | Templeton, IA | Tractor Hitch | US1491637A | 22 Apr 1924 |
| Schrum | George H. | Templeton, IA | Harrow | US1241033A | 25 Sep 1917 |
| Schulte | Joseph A. | Aracadia, IA | Electric Clock | US572131A | 1 Dec 1896 |
| Schwaller | Joseph Clemens | Halbur, IA | Wheel-Cultivator | US355106A | 28 Dec 1886 |
| Schwaller | Joseph C. | Halbur, IA | Combined tool | US372932A | 8 Nov 1887 |
| Schwaller | William L. | Halbur, IA | Belt guide | US489334A | 3 Jan 1893 |
| Seiler | Joseph | Maple River Junction, IA | Stock watering device | Us581623A | 27 Apr 1897 |
| Shefferd | Charles | Coon Rapids, IA | Clothes draining device | US724131A | 31 Mar 1903 |
| Slife | Clifford | Dedham, IA | Signal for Grain-Bins | US767713A | 16 Aug 1904 |
| Smalley | Lindsley H. | Coon Rapids, IA | Boot for animals | US500968A | 4 Jul 1893 |
| Smith | Herbert W. | Coon Rapids, IA | Window-Shade Bracket | US1341025A | 25 May 1920 |
| Smith | Herbert W. | Coon Rapids, IA | Window shade bracket | US1231441A | 26 Jun 1917 |
| Smith | Herbert W. | Coon Rapids, IA | Window shade bracket | US1283938A | 5 Nov 1918 |
| Snyder | John F. | Glidden, IA | Road grader | US1526510A | 17 Feb 1925 |
| Spauding | Charles Walter | Carroll, IA | Curete | US707031A | 12 Aug 1902 |
| Stephenson | Taylor | Manning, IA | Paint | US601910A | 5 Apr 1898 |
| Stoll | Louis S. | Aradia, IA | Gate latch | US339594A | 6 Apr 1886 |
| Sutton | Isaac H. | Coon Rapids, IA | Improvement in wind wheels | US96631A | 9 Nov 1869 |
| Swender | Albert W. | Carroll, IA | Dog-Muzzle | US868145A | 15 Oct 1907 |
| Swender | Albert W. | Carroll, IA | Calf-Weaner | US896598A | 18 Aug 1908 |
| Swender | Albert W. | Carroll, IA | Stock-Weaner | US869108A | 22 Oct 1907 |
| Swender | Albert W. | Carroll, IA | Muzzle | US836413A | 20 Nov 1906 |
| Swender | Albert W. | Carroll, IA | Chimney-Cap | US1060512A | 29 Apr 1913 |
| Swender | Albert W. | Carroll, IA | Wire fence | US801417A | 10 Oct 1905 |
| Swender | Albert W. | Carroll, IA | Calf weaner | US836949A | 27 Nov 1906 |
| Taylor | James | Manning, IA | Steam generator | US410267A | 3 Sep 1889 |
| Thalhammer | Korbinian | Coon Rapids, IA | Draft Equalizer | US1532164A | 7 Apr 1925 |
| Tharp | William R. | Glidden, IA | Corn-Harvester | US533756A | 5 Feb 1895 |
| Tharp | William R. E. | Glidden, IA | Fire kindler | US604438A | 24 May 1898 |
| Tharp | William R. E. | Glidden, IA | Corn harvester | US533756A | 5 Feb 1895 |
| Thieleke | August | Templeton, IA | Recording desk | US790987A | 30 May 1905 |
| Trost | Carl | Manning, IA | Attachment for corn planters | US1408547A | 7 Mar 1922 |
| Unger | John W. | Carroll, IA | Machine for Repairing Vehicle-Axles | US664003A | 18 Dec 1900 |
| Westendorf | Henry | Halbur, IA | Supporting fixture for closure members | US1549173A | 11 Aug 1925 |
| Westendorg | Henry | Halbur, IA | Clutch Dismembering and Assembling Tool | US1505834A | 19 Aug 1924 |
| Whitcomb | Charles C. | Coon Rapids, IA | Steering gear for traction engines | US918368A | 13 Apr 1909 |
| Wiedemeier | Anton A. | Carroll, IA | Display-Apparatus | US903253A | 10 Nov 1908 |
| Wiedemeier | Anton A. | Carroll, IA | Display Apparatus | US873817A | 17 Dec 1907 |
| Wiedemeier | Joseph Jr. | Carroll, IA | Display-Apparatus | US903253A | 10 Nov 1908 |
| Wiedemeier | Joseph Jr. | Carroll, IA | Display Apparatus | US873817A | 17 Dec 1907 |
| Wiedemeyer | William I. | Carroll, IA | Manure spreader | US922830A | 25 May 1909 |
| Wilson | Alonzo N. | Coon Rapids, IA | Harvester | US219553A | 9 Sep 1879 |
| Woodring | Robert R. | Carroll, IA | Fruit-Picker | US862227A | 6 Aug 1907 |
| Wurzer | Joseph | Dedham, IA | Straw spreader | US1501460A | 15 Jul 1924 |
