Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10323759 | Check valve control unit | Forrest Halvorson, David G. Hildebrandt, Donald L. Bartell, JR., Dennis Jay Smith, Jr., Timothy M. O'Shea | 2019-06-18 |
| 6668848 | Pneumatic volume booster for valve positioner | Lawrence R. Lafler | 2003-12-30 |
| 6659247 | Pneumatic volume booster for valve positioner | Lawrence R. Lafler | 2003-12-09 |
| 6484751 | Position detection for rotary control valves | Lawrence R. Lafler, Val DiEuliis, Vernon Cottles | 2002-11-26 |
| 6357335 | Pneumatic volume booster for valve positioner | Lawrence R. Lafler | 2002-03-19 |
| 6244296 | Position detection for rotary control valves | Lawrence R. Lafler, Val DiEullis, Vernon Cottles | 2001-06-12 |
| 5226851 | Low backlash compensating coupler | Jeffrey J. Hallermann | 1993-07-13 |
| 5176464 | Mechanical coupling particularly adapted for coupling a valve and actuator | — | 1993-01-05 |
| 4558605 | Valve actuator coupling | — | 1985-12-17 |