Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6659199 | Bearing elements for drill bits, drill bits so equipped, and method of drilling | — | 2003-12-09 |
| 6216805 | Dual grade carbide substrate for earth-boring drill bit cutting elements, drill bits so equipped, and methods | Roger Lays | 2001-04-17 |
| 5996713 | Rolling cutter bit with improved rotational stabilization | Rudolf Carl Pessier, John Vanderstaay Kenner, Matthew R. Isbell, Danny E. Scott | 1999-12-07 |
| 5890550 | Earth-boring bit with wear-resistant material | Brian C. Wiesner, Greg Van Klompenburg | 1999-04-06 |