Issued Patents 2004
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6782958 | Hardfacing for milled tooth drill bits | Dah-Ben Liang, Alysia C. White, Greg Lockwood | 2004-08-31 |
| 6745645 | Enhanced gage protection for milled tooth rock bits | — | 2004-06-08 |
| 6698098 | Cone erosion protection for roller cone drill bits | Zhigang Fang, Robert H. Slaughter, Jr. | 2004-03-02 |