Showing 1–7 of 7 inventors
| Rank | Inventor | Primary Company | Patents |
|---|---|---|---|
| 1 | Eric Renteria | — | 6 |
| 2 | Curt Grimm | Hawkeyepedershaab Concrete Technologies | 2 |
| 3 | Kent L. Grimm | — | 1 |
| 3 | Laurel A. Shepley | John Deere | 1 |
| 3 | Leo E. Williams | — | 1 |
| 3 | Peter A. Simmons | Hon Technology | 1 |
| 3 | Chad C. Lolling | Hon Technology | 1 |
Part of Iowa