Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5638864 | Steering control unit with flow amplification for unequal area cylinder | Donald M. Haarstad, Timothy A. Hjelsand | 1997-06-17 |
| 5136844 | Controller with reduced travel limit slip | Dwight B. Stephenson | 1992-08-11 |
| 4558720 | Closed-center controller for use with unequal area cylinder | James K. Yip | 1985-12-17 |