Issued Patents 1994
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5351769 | Earth-boring bit having an improved hard-faced tooth structure | Danny E. Scott, Rudolf Carl Pessier | 1994-10-04 |
| 5351771 | Earth-boring bit having an improved hard-faced tooth structure | — | 1994-10-04 |
| 5295549 | Mechanical lock to prevent seal ring rotation | George E. Dolezal, Douglas J. Clinkscales, Turlach Paul Boylan | 1994-03-22 |