Issued Patents 2003
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6615936 | Method for applying hardfacing to a substrate and its application to construction of milled tooth drill bits | J. Albert Sue, Alysia C. White | 2003-09-09 |
| 6536542 | Rock bit seal with multiple dynamic seal surface elements | Zhigang Fang, Chris E. Cawthorne, Sujian Huang | 2003-03-25 |