Issued Patents 1994
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5372207 | Seismic prospecting method and device using a drill bit working in a well | Charles Naville, Guy Pignard, Christian Wittrisch | 1994-12-13 |
| 5363094 | Stationary system for the active and/or passive monitoring of an underground deposit | Jacques Cretin, Claude Beauducel, Thierry Lepage | 1994-11-08 |