Showing 1–6 of 6 inventors
| Rank | Inventor | Primary Company | Patents |
|---|---|---|---|
| 1 | Daniel L. Forsyth | Unknown | 7 |
| 2 | Daryl Rubner | Unverferth Manufacturing Co. | 5 |
| 3 | Richard A. Suckow | — | 3 |
| 3 | Allan L. Lorenc | Rawson Control Systems | 3 |
| #5 | James R. Tharaldson | — | 2 |
| #6 | Allan L. Lorence | Rawson Control Systems | 1 |
Part of Iowa