Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| RE33846 | Electrohydraulic valve system | Edward H. Fletcher | 1992-03-17 |
| 4799645 | Pilot operated hydraulic control valve | Gregory E. Sparks | 1989-01-24 |
| 4679765 | Low leakage orifice-controlled poppet valve | Rohn Lee Olson | 1987-07-14 |
| 4506700 | Poppet valve with float function | — | 1985-03-26 |
| 4461314 | Electrohydraulic valve | — | 1984-07-24 |
| 4437385 | Electrohydraulic valve system | Edward H. Fletcher | 1984-03-20 |
| 4419642 | Solenoid with saturable element | Kenneth J. Stoss, Gregory E. Sparks | 1983-12-06 |