Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5842700 | Composite rock bit seal | Zhigang Fang, Sujian Huang, Chris E. Cawthorne, Brian A. James, Robert Denton | 1998-12-01 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5842700 | Composite rock bit seal | Zhigang Fang, Sujian Huang, Chris E. Cawthorne, Brian A. James, Robert Denton | 1998-12-01 |