Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4390214 | Crawler track structure having wear surface | Jonas L. Gunter, Doyle V. Haren, Richard D. Medford | 1983-06-28 |
| 4248309 | Fire extinguishing system utilizing the engine cooling system | Doyle V. Haren | 1981-02-03 |