Showing 1–9 of 9 inventors
| Rank | Inventor | Primary Company | Patents |
|---|---|---|---|
| 1 | Carl E. Kittle | John Deere | 2 |
| 2 | Norman Frederick Lemmon | John Deere | 1 |
| 2 | William Herbert Sims, III | NASA | 1 |
| 2 | Peter D. Wetrich | John Deere | 1 |
| 2 | Roger J. Nelson | John Deere | 1 |
| 2 | Lyle R. Madson | John Deere | 1 |
| 2 | Harlan Welbert Van Gerpen | John Deere | 1 |
| 2 | Charles W. Formwalt, Jr. | John Deere | 1 |
| 2 | James L. Price | John Deere | 1 |
Part of Iowa