Showing 1–9 of 9 inventors
| Rank | Inventor | Primary Company | Patents |
|---|---|---|---|
| 1 | John P. Maher | Sprague Electric | 2 |
| 2 | Thomas R. Johnston | Bratney Companies | 1 |
| 2 | Michael L. Hilty | — | 1 |
| 2 | Andrew Morse | Pella | 1 |
| 2 | Robert Townsend | Townsend Industries | 1 |
| 2 | CLARA ALARCON | Pioneer (Corteva) | 1 |
| 2 | Darin F. Dostal | Marel Meat Processing | 1 |
| 2 | Bjorn Johnson | Vermeer Manufacturing | 1 |
| 2 | Mary Rupe | Pioneer (Corteva) | 1 |
Part of Iowa