Issued Patents All Time
Showing 1–11 of 11 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8784074 | High pressure intensifiers | Peter John Davey, Vernon Lester Hutchings | 2014-07-22 |
| 8720576 | Mounting a module on an underwater structure | Kevin Marlow, Phillip I. Tarr, Steven Lewis Charles Simpson | 2014-05-13 |
| 7237472 | Linear hydraulic stepping actuator with fast close capabilities | — | 2007-07-03 |
| 6782949 | Choke valve with pressure transmitters | Larry J. Bohaychuk | 2004-08-31 |
| 6648070 | Insert assembly for a wellhead choke valve | Loren Kowalchuk | 2003-11-18 |
| 6105614 | Choke valve for throttling fluid flow | Larry J. Bohaychuk | 2000-08-22 |
| 4541295 | Valve actuator having a rotary bi-directional apparatus with a dual ratchet mechanism | — | 1985-09-17 |
| 4540022 | Choke for drilling or production use | — | 1985-09-10 |
| 4471810 | Valve apparatus | John D. Muchow | 1984-09-18 |
| 4461316 | Drilling choke | John D. Muchow | 1984-07-24 |
| 4360040 | Multiple orifice valves | John D. Muchow | 1982-11-23 |