Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5975805 | Oil drilling rig system | Pierre-Yves Morvan | 1999-11-02 |
| 5205163 | Method and apparatus for determining the torque applied to a drillstring at the surface | — | 1993-04-27 |