Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6123337 | Composite earth boring bit seal | Zhigang Fang, Sujian Huang, Chris E. Cawthorne, Brian A. James, Robert Denton +1 more | 2000-09-26 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6123337 | Composite earth boring bit seal | Zhigang Fang, Sujian Huang, Chris E. Cawthorne, Brian A. James, Robert Denton +1 more | 2000-09-26 |