Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4844159 | Locking device for securing a tool in a well conduit | Peter Airey | 1989-07-04 |
| 4658904 | Subsea master valve for use in well testing | Dale Meek | 1987-04-21 |
| 4651828 | Safety valve in particular for closing an oil well | — | 1987-03-24 |
| 4577662 | Plug valve equipped with pressure equalization means | — | 1986-03-25 |
| 4442902 | Remote hydraulic control method and apparatus, notably for underwater valves | Jean-Pierre Muller | 1984-04-17 |