Showing 1–6 of 6 inventors
| Rank | Inventor | Primary Company | Patents |
|---|---|---|---|
| 1 | Larry N. Smith | John Deere | 2 |
| 2 | Stephen K. Parsons | John Deere | 1 |
| 2 | David L. Barker | Musco | 1 |
| 2 | Frank K. O'Toole | John Deere | 1 |
| 2 | Leonard O. Courtney | — | 1 |
| 2 | David Henry Diebold | John Deere | 1 |
Part of Iowa