Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6725953 | Drill bit having diamond impregnated inserts primary cutting structure | David Truax, Thomas W. Oldham, Duane R. Van Waes | 2004-04-27 |
| 6394202 | Drill bit having diamond impregnated inserts primary cutting structure | David Truax, Thomas W. Oldham, Duane R. Van Waes | 2002-05-28 |