Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4860613 | Steer-by-driving transmission with ground speed control | Robert F. Combs | 1989-08-29 |
| 4860869 | Brake apply system with a differential mechanism | — | 1989-08-29 |
| 4836341 | Control system for a hydraulic retarder | — | 1989-06-06 |