Issued Patents 1994
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5310012 | Actuating device associated with a drill string and comprising a hydrostatic drilling fluid circuit, actuation method and application thereof | Jean-Baptiste Fay, Benoit Amaudric du Chaffaut | 1994-05-10 |