Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5671817 | Drill bit with dual reaming rows | Roger C. Smith | 1997-09-30 |
| 4552228 | Low pressure differential compensator | Robert F. Evans | 1985-11-12 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5671817 | Drill bit with dual reaming rows | Roger C. Smith | 1997-09-30 |
| 4552228 | Low pressure differential compensator | Robert F. Evans | 1985-11-12 |