Issued Patents 1982
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4347900 | Hydraulic connector apparatus and method | — | 1982-09-07 |
| 4319633 | Drill pipe tester and safety valve | Michael E. McMahan, Gerald D. Jackson | 1982-03-16 |
| 4319634 | Drill pipe tester valve | Michael E. McMahan | 1982-03-16 |