Issued Patents All Time
Showing 1–15 of 15 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6152172 | Hall effect valve spool position sensor | Rollin C. Christianson, Leif Pedersen | 2000-11-28 |
| 6098403 | Hydraulic control valve system with pressure compensator | — | 2000-08-08 |
| 6073652 | Pilot solenoid control valve with integral pressure sensing transducer | Xiaolong Yang, Brian Clifton | 2000-06-13 |
| 5890362 | Hydraulic control valve system with non-shuttle pressure compensator | — | 1999-04-06 |
| 5878647 | Pilot solenoid control valve and hydraulic control system using same | Xiaolong Yang | 1999-03-09 |
| 5791142 | Hydraulic control valve system with split pressure compensator | Michael Layne, Leif Pedersen, Michael J. Paik | 1998-08-11 |
| 5715865 | Pressure compensating hydraulic control valve system | — | 1998-02-10 |
| 5664417 | Control valve for prime mover speed control in hydraulic systems | David Dornbach, Leif Pedersen | 1997-09-09 |
| 5588510 | Variable damping force shock absorber | — | 1996-12-31 |
| 5579642 | Pressure compensating hydraulic control system | Eric P. Hamkins, Michael Layne, Leif Pedersen, Lynn A. Russell | 1996-12-03 |
| 5579676 | Hydraulic valve to maintain control in fluid-loss condition | — | 1996-12-03 |
| 4693272 | Post pressure compensated unitary hydraulic valve | — | 1987-09-15 |
| 4627468 | Hydraulic control valve with manual override | Michael J. Paik | 1986-12-09 |
| 4597410 | Cross line relief valve mechanism | — | 1986-07-01 |
| 4570672 | Hydraulic control valve with independently operable bypass valve | — | 1986-02-18 |