Issued Patents All Time
Showing 101–106 of 106 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5130950 | Ultrasonic measurement apparatus | James C. Mayes | 1992-07-14 |
| 5107705 | Video system and method for determining and monitoring the depth of a bottomhole assembly within a wellbore | Peter Wraight, James C. Mayes | 1992-04-28 |
| 5063776 | Method and system for measurement of fluid flow in a drilling rig return line | Klaus J. Zanker | 1991-11-12 |
| 4890927 | Cement mixing apparatus | Andre Salvaire, Jean-Paul Jour | 1990-01-02 |
| 4838699 | Cement mixing process | Jean-Paul Jour, Andre Salvaire | 1989-06-13 |
| 4754641 | Method and apparatus for measurement of fluid flow in a drilling rig return line | Klaus J. Zanker, Andre Orban | 1988-07-05 |