| Search Again | Story County, Iowa Inventory Patents |
Story Co. Home Page |
| Name | Patent Title | Patent Number |
City | Year |
|---|---|---|---|---|
| Frederick R. TROEH | soil movement detection apparatus | 03992927 | Ames | 1976 |
| Frederick R. TROEH | variable flush water closet | 04483024 | Ames | 1984 |
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