Showing 1–10 of 10 inventors
| Rank | Inventor | Primary Company | Patents |
|---|---|---|---|
| 1 | Iven R. Norstrud | — | 3 |
| 2 | Larry R. Van Dusseldorp | — | 2 |
| 2 | John H. Threlkeld | — | 2 |
| 2 | Gary R. Laabs | Unknown | 2 |
| 2 | Thomas G. Formanek | Stellar Industries | 2 |
| #6 | Elton C. Sheets | Stellar Industries | 1 |
| #6 | Mitchell Paul Horstman | Stellar Industries | 1 |
| #6 | Randal Redman | Iowa Mold Tooling Co. | 1 |
| #6 | Roger L. Huisinga | — | 1 |
| #6 | Charles R. Moeckly | — | 1 |
Part of Iowa