Showing 1–8 of 8 inventors
| Rank | Inventor | Primary Company | Patents |
|---|---|---|---|
| 1 | Danny W. Miller | Donaldson Company | 11 |
| 2 | Robert Mestdagh | Cleveland Reclaim Industries | 3 |
| 3 | Dennis D. Hofmeister | — | 1 |
| 3 | Derek S. Hoyt | — | 1 |
| 3 | Dale Stockdale | — | 1 |
| 3 | Clarence T. Sherfield | — | 1 |
| 3 | Bartt Weichers | — | 1 |
| 3 | Stanley J. Siems | — | 1 |
Part of Iowa