Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4885536 | Magnetic process for determining a trajectory for finding a magnetic object and apparatus for performing the process | Roland Blanpain, Patrick Le Masson | 1989-12-05 |
| 4649349 | Device for automatically compensating the magnetism of drill string members | Guy Chiron | 1987-03-10 |
| 4636956 | Method and device for optimization of seismic data | Serge Vannier, Robert Garotta, Andre Lozes | 1987-01-13 |