Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4703266 | Gradient meter with thin magnetic layer | Andre Dumont | 1987-10-27 |
| 4649349 | Device for automatically compensating the magnetism of drill string members | Jean-Charles Vidal | 1987-03-10 |