Showing 1–7 of 7 inventors
| Rank | Inventor | Primary Company | Patents |
|---|---|---|---|
| 1 | Burnell R. Kringstad | Kringstad Ironworks | 15 |
| 2 | Terry D. Fischer | — | 3 |
| 3 | Harold H. Schmeets | — | 2 |
| #4 | Steven J. Bachmeier | — | 1 |
| #4 | Dan Bienek | — | 1 |
| #4 | Clifford C. Grosz | Unknown | 1 |
| #4 | Albert Faul, Jr. | — | 1 |
Part of North Dakota