Showing 1–10 of 10 inventors
| Rank | Inventor | Primary Company | Patents |
|---|---|---|---|
| 1 | James Richard Rankin | Vermeer Manufacturing | 11 |
| 2 | John C. McCombs | Vermeer Manufacturing | 4 |
| 2 | Jerry A. Williams | Unknown | 4 |
| #4 | Ernest J. Wilcox | — | 3 |
| #5 | Rick W. Talbert | — | 2 |
| #5 | R. Dean Doonan | — | 2 |
| #7 | Lester L. Thompson | — | 1 |
| #7 | Cloyde Lynn Carl | — | 1 |
| #7 | Keith C. Walsh | — | 1 |
| #7 | Frank R. Brownell | Brownells | 1 |
Part of Iowa