Issued Patents 1994
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5365674 | Device for measuring the displacement of a swivel of a drilling mast | Didier Etchegoyhen | 1994-11-22 |
| 5289354 | Method for acoustic transmission of drilling data from a well | Frederic Clayer, Jean Sancho | 1994-02-22 |