Showing 1–9 of 9 inventors
| Rank | Inventor | Primary Company | Patents |
|---|---|---|---|
| 1 | Randall J. Thiessen | Unknown | 7 |
| 2 | Theresa A. Lyon | Unknown | 3 |
| 3 | Earl A. Cuthbertson | — | 1 |
| 3 | David J. Vavra | Ritchie Industries | 1 |
| 3 | James A. Nygren | — | 1 |
| 3 | Mike Micllef | — | 1 |
| 3 | James Lee Eberhart | — | 1 |
| 3 | Gregory D. Darling | — | 1 |
| 3 | Bobbie G. Cuthbertson | — | 1 |
Part of Iowa