Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4866607 | Self-contained downhole gauge system | Terry O. Anderson, J. Mark Richardson, Jack C. Penn, Michael Lynch, Gilbert H. Forehand +5 more | 1989-09-12 |
| 4817437 | Pressure communicating, fluid isolating interface | John Dennis | 1989-04-04 |