Issued Patents 1997
Showing 1–4 of 4 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 |