Showing 1–7 of 7 inventors
| Rank | Inventor | Primary Company | Patents |
|---|---|---|---|
| 1 | Russel Miles Pinnisch | Pioneer (Corteva) | 4 |
| 2 | Michael J. Gruca | Champion Laboratories | 1 |
| 2 | John P. Valenta | Siemens Medical Solutions Usa | 1 |
| 2 | Frank R. Ripley | Ingersoll Cutting Tool | 1 |
| 2 | Theophilus McGee | Ferro | 1 |
| 2 | Robert G. Quittschreiber | — | 1 |
| 2 | Arthur R. King, IV | Andersen | 1 |
Part of Illinois