Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4846273 | Jar mechanism accelerator | Edwin A. Anderson | 1989-07-11 |
| 4647085 | Sealing arrangement for pin and box threaded connection of tubular members | Edwin A. Anderson | 1987-03-03 |
| 4606417 | Pressure equalized stabilizer apparatus for drill string | Edwin A. Anderson | 1986-08-19 |
| 4552230 | Drill string shock absorber | Edwin A. Anderson | 1985-11-12 |
| 4545444 | Jar mechanism energizer | Edwin A. Anderson | 1985-10-08 |
| 4226289 | Independent one-way acting hydraulic jar sections for a rotary drill string | Edwin A. Anderson | 1980-10-07 |