Issued Patents 2004
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6808031 | Drill bit having large diameter PDC cutters | Graham Mensa-Wilmot | 2004-10-26 |
| 6725953 | Drill bit having diamond impregnated inserts primary cutting structure | Thomas W. Oldham, Carl Edward Penuel, Duane R. Van Waes | 2004-04-27 |