Issued Patents 2003
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6615935 | Roller cone bits with wear and fracture resistant surface | Zhigang Fang, Alysia C. White, Chris E. Cawthorne | 2003-09-09 |
| 6607835 | Composite constructions with ordered microstructure | Zhigang Fang, Alysia C. White | 2003-08-19 |
| 6571889 | Rotary cone bit with functionally-engineered composite inserts | Zhigang Fang, Robert Denton | 2003-06-03 |