Issued Patents 1994
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5355750 | Rolling cone bit with improved wear resistant inserts | Redd H. Smith, Gordon A. Tibbitts | 1994-10-18 |
| 5351768 | Earth-boring bit with improved cutting structure | Robert E. Grimes, Matthew R. Isbell, Rudolf Carl Pessier | 1994-10-04 |
| 5351769 | Earth-boring bit having an improved hard-faced tooth structure | Anton F. Zahradnik, Rudolf Carl Pessier | 1994-10-04 |
| 5348108 | Rolling cone bit with improved wear resistant inserts | Redd H. Smith, Gordon A. Tibbitts | 1994-09-20 |
| 5346026 | Rolling cone bit with shear cutting gage | Rudolf Carl Pessier | 1994-09-13 |
| 5287936 | Rolling cone bit with shear cutting gage | Robert E. Grimes | 1994-02-22 |