Issued Patents 1997
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5697462 | Earth-boring bit having improved cutting structure | Robert E. Grimes, Rudolf Carl Pessier | 1997-12-16 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5697462 | Earth-boring bit having improved cutting structure | Robert E. Grimes, Rudolf Carl Pessier | 1997-12-16 |