Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4877095 | Stopper for cable passages or conduits | — | 1989-10-31 |
| 4803874 | Device and method for determining the orientation of fractures in a geological formation | Jacques Marrast, Andre Pauc | 1989-02-14 |
| 4794791 | Method and device for making measurements characterizing geological formations, in a horizontal borehole formed from an underground way | — | 1989-01-03 |