Showing 1–10 of 10 inventors
| Rank | Inventor | Primary Company | Patents |
|---|---|---|---|
| 1 | Gerald L. Widmer | Unknown | 4 |
| 2 | Nathan L. Kaeb | Illinois Grain & Seed | 3 |
| 2 | Gerald E. Aardsma | Unknown | 3 |
| 2 | Larry J. Gray | Trailmobile | 3 |
| #5 | D. A. Terry | Unknown | 2 |
| #5 | John Sandford | — | 2 |
| #5 | Anthony R. Hakl | — | 2 |
| #8 | Dennis Alan Watson | — | 1 |
| #8 | Kim Elliott | — | 1 |
| #8 | Fred J. Waldbeser | — | 1 |
Part of Illinois