Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4421135 | Hydraulic selector valve having joy stick control | Ronald W. Harshman | 1983-12-20 |
| 4296773 | Hydraulic selector valve having joy stick control | Ronald W. Harshman | 1981-10-27 |