Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4727944 | Percussion drill string assembly | — | 1988-03-01 |
| 4649778 | Pipe spinner assembly | — | 1987-03-17 |
| 4397893 | System for flame spray coating of a rod | — | 1983-08-09 |
| 4380951 | Mud pump piston assembly | — | 1983-04-26 |
| 4317409 | Mud pump piston assembly | — | 1982-03-02 |
| 4306471 | Pipe spinner assembly | — | 1981-12-22 |