Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4844161 | Locking orientation sub and alignment housing for drill pipe conveyed logging system | E. Edward Rankin, Martin L. Tomek | 1989-07-04 |
| 4799546 | Drill pipe conveyed logging system | E. Edward Rankin, Martin L. Tomek, David M. Moody | 1989-01-24 |