| Search Again | Story County, Iowa Inventory Patents |
Story Co. Home Page |
| Name | Patent Title | Patent Number |
City | Year |
|---|---|---|---|---|
| David K. HOLGER | method and means for measuring sound intensity | 04655086 | Ames | 1987 |
| David K. HOLGER | central vacuum with acoustical damping | 05737797 | Ames | 1998 |
| David K. HOLGER | central vacuum cleaner muffler | 06052863 | Ames | 2000 |
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