Issued Patents 2004
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6772849 | Protective overlay coating for PDC drill bits | Kumarj T. Kembaiyan | 2004-08-10 |
| 6725953 | Drill bit having diamond impregnated inserts primary cutting structure | David Truax, Carl Edward Penuel, Duane R. Van Waes | 2004-04-27 |