Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5695018 | Earth-boring bit with negative offset and inverted gage cutting elements | Rudolf Carl Pessier | 1997-12-09 |
| 5592995 | Earth-boring bit having shear-cutting heel elements | Danny E. Scott, Rudolf Carl Pessier, Nigel Charles Meany, Alain Besson | 1997-01-14 |