Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4338856 | Dual pilot counterbalance valve | Richard Wigmore | 1982-07-13 |
| 4244275 | Counterbalance valve | — | 1981-01-13 |
| 4236690 | Electrohydraulic flow control apparatus | Richard Wigmore | 1980-12-02 |
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4338856 | Dual pilot counterbalance valve | Richard Wigmore | 1982-07-13 |
| 4244275 | Counterbalance valve | — | 1981-01-13 |
| 4236690 | Electrohydraulic flow control apparatus | Richard Wigmore | 1980-12-02 |