Showing 1–9 of 9 inventors
| Rank | Inventor | Primary Company | Patents |
|---|---|---|---|
| 1 | Thomas C. Doty | Doty & Sons Concrete Products | 2 |
| 1 | Jerry E. Stuart | White Consolidated Industries | 2 |
| 1 | Chhiu-Tsu Lin | Northern Illinois University | 2 |
| 1 | Samuel J. Doty | Doty & Sons Concrete Products | 2 |
| #5 | Joseph C. Carley | Patton Electric Company | 1 |
| #5 | Al Burgin | — | 1 |
| #5 | Ronald C. Lewen | — | 1 |
| #5 | Stephen Michael Faivre | John Deere | 1 |
| #5 | Michael Thomas | Great Dane Trailers | 1 |
Part of Illinois