Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5697462 | Earth-boring bit having improved cutting structure | Rudolf Carl Pessier, Christopher J. Rohmer | 1997-12-16 |
| 5655612 | Earth-boring bit with shear cutting gage | Danny E. Scott, Rudolf Carl Pessier | 1997-08-12 |