Issued Patents 2004
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6779613 | Drill bits with controlled exposure of cutters | Mark W. Dykstra, William Heuser, Michael L. Doster, Theodore E. Zaleski, Jr., Jack T. Oldham +3 more | 2004-08-24 |
| 6672406 | Multi-aggressiveness cuttting face on PDC cutters and method of drilling subterranean formations | — | 2004-01-06 |