Showing 1–7 of 7 inventors
| Rank | Inventor | Primary Company | Patents |
|---|---|---|---|
| 1 | Joel J. Bleth | Medora Environmental | 3 |
| 2 | Gary A. Kudrna | Medora Environmental | 2 |
| 2 | Paul J. Steffes | Steffes | 2 |
| 2 | Willard R. Tormaschy | Medora Environmental | 2 |
| #5 | William P. Reiter | New Designz | 1 |
| #5 | Dean A. Kovash | Steffes | 1 |
| #5 | Doug Walter | — | 1 |
Part of North Dakota