| Search Again | Story County, Iowa Inventory Patents |
Story Co. Home Page |
| Name | Patent Title | Patent Number |
City | Year |
|---|---|---|---|---|
| Carl E. EKBERG | prestressed metal and concrete composite structure | 03712010 | Ames | 1973 |
| Carl E. EKBERG | prestressed composite floor slab and method of making the same | 04809474 | Ames | 1989 |
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