Showing 1–9 of 9 inventors
| Rank | Inventor | Primary Company | Patents |
|---|---|---|---|
| 1 | George B. Grim | Caterpillar | 4 |
| 2 | Gerald P. Simmons | Caterpillar | 1 |
| 2 | Ronald P. Gill | Peabody Coal | 1 |
| 2 | David E. Bullard | Caterpillar | 1 |
| 2 | Jerry A. Clouse | Caterpillar | 1 |
| 2 | J. Michael Leach | Caterpillar | 1 |
| 2 | John W. Grillot | Caterpillar | 1 |
| 2 | James L. Taylor | Cm Tech Co. | 1 |
| 2 | Thomas L. Bagby | Caterpillar | 1 |
Part of Illinois