Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4945995 | Process and device for hydraulically and selectively controlling at least two tools or instruments of a valve device allowing implementation of the method of using said device | Jacques Lessi, Jean-Paul Michel | 1990-08-07 |
| 4940094 | Method and device to actuate specialized intervention equipment in a drilled well having at least one section highly slanted with respect to a vertical line | Jacques Lessi | 1990-07-10 |