Issued Patents All Time
Showing 1–16 of 16 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10513660 | Compact fast pyrolysis system for conversion of carbonaceous materials to liquid, solid and gas | Peter Fransham, Cory Leggett | 2019-12-24 |
| 10030482 | Valve mechanism having tool trap | — | 2018-07-24 |
| D808229 | Knife block | — | 2018-01-23 |
| D808230 | Knife block | — | 2018-01-23 |
| D804916 | Knife block | — | 2017-12-12 |
| D804257 | Knife block | — | 2017-12-05 |
| 6394460 | One-piece ram element block for wireline blowout preventers | James Allen Douty | 2002-05-28 |
| 6145807 | By-pass stud with integral safety valve | James Allen Douty | 2000-11-14 |
| 5662312 | Pressurized sheave mechanism for high pressure wireline service | Russell C. Gilleylen | 1997-09-02 |
| 5287879 | Hydraulically energized wireline blowout preventer | Lionel M. Gingras, Russell C. Gilleylen | 1994-02-22 |
| 4938290 | Wireline blowout preventer having mechanical and hydraulic sealing | Lionel M. Gingras | 1990-07-03 |
| 4886115 | Wireline safety mechanism for wireline tools | Howard R. Kitney | 1989-12-12 |
| 4883119 | Mechanical latching device operated by dead weight and tension | — | 1989-11-28 |
| 4846272 | Downhole shuttle valve for wells | — | 1989-07-11 |
| 4828023 | Mechanical latching device operated by dead weight and tension | — | 1989-05-09 |
| 4687055 | Wire-line controlled down-hole shut-in tool for wells | — | 1987-08-18 |