Showing 1–5 of 5 inventors
| Rank | Inventor | Primary Company | Patents |
|---|---|---|---|
| 1 | Douglas P. Gethmann | Fisher Controls International | 26 |
| 2 | Doug Gethmann | Fisher Controls International | 2 |
| 2 | Craig A. Purvis | John Deere | 2 |
| #4 | Lyle W. Lage | — | 1 |
| #4 | Frederick A. Lage | — | 1 |
Part of Iowa