Issued Patents 2003
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6659206 | Hardfacing composition for rock bits | Alysia C. White | 2003-12-09 |
| 6655478 | Fracture and wear resistant rock bits | Gary R. Portwood, Paul E. Cox, John L. Williams | 2003-12-02 |