Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6203289 | Hydraulic alternating volumetric pumping system | Yvon Castel | 2001-03-20 |
| 4967843 | Device for producing an effluent contained in a submarine geological formation and production method employed using such a device | Frederic Hoffmann | 1990-11-06 |
| 4860825 | Device for positioning a tool or instrument in a duct | Andre Pauc, Frederic Hoffmann | 1989-08-29 |
| 4723890 | Articulated jet pump, usable more particularly in TFL technique for activating hydrocarbon or water producing wells | Frederic Hoffmann, Andre Pauc | 1988-02-09 |