Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5692537 | Adjustable hydraulic control valve module | Abbas Arian | 1997-12-02 |
| 5680049 | Apparatus for measuring formation resistivity through a conductive casing having a coaxial tubing inserted therein | Robert William Gissler, Otto N. Fanini, H. Wade Bullock, Peter Rellinger | 1997-10-21 |
| 5666993 | Pressure isolated pilot check valve | Lowell R. Milligan | 1997-09-16 |
| 5617927 | Sidewall rotary coring tool | — | 1997-04-08 |
| 5411106 | Method and apparatus for acquiring and identifying multiple sidewall core samples | Marcelo F. Civarolo, Derryl Schroeder | 1995-05-02 |
| 4844197 | Hydraulic release system for use in a borehole apparatus | — | 1989-07-04 |
| 4784238 | Large diameter borehole apparatus | — | 1988-11-15 |