Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4828294 | Threaded joint for steel pipes containing a sealing device located at the level of the threading | Bernard Plaquin | 1989-05-09 |
| 4828295 | Steel tube threaded joint having an impervious device at the level of the threading | Bernard Plaquin | 1989-05-09 |
| 4426105 | Joints for pipes, particularly intended for the oil industry | Bernard Plaquin, Jean Mantelle | 1984-01-17 |