Showing 1–11 of 11 inventors
| Rank | Inventor | Primary Company | Patents |
|---|---|---|---|
| 1 | Glen R. Helmuth | Spartan Motors | 5 |
| 2 | Kenneth J. Workman | — | 2 |
| 3 | Earl F. Dean | — | 1 |
| 3 | Shon L Hadden | — | 1 |
| 3 | Wendall D. Rust | — | 1 |
| 3 | Peggy R. Murphy | — | 1 |
| 3 | Anthony R. King | R. R. Donnelley & Sons | 1 |
| 3 | Floyd P. Weldy | Bendix Limited | 1 |
| 3 | Adam Motz | Unknown | 1 |
| 3 | Jerry K. Border | R. R. Donnelley & Sons | 1 |
| 3 | Jesse C. Hartung | — | 1 |
Part of Indiana