Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4755943 | Communications system between a station on the surface of a liquid medium and submerged control and monitoring means of a group of submerged well head valves | — | 1988-07-05 |
| 4751939 | Immersed hydraulic unit for controlling an underwater oil working station | — | 1988-06-21 |