Issued Patents 2021
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11199050 | Combined crushing super-variable-diameter drill bit for natural gas hydrate exploitation | Guorong Wang, Yang Tang, Qingyou Liu, Shouwei Zhou, Xushen Li +9 more | 2021-12-14 |