Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11697970 | Directly connected drill pipe applicable to extreme conditions | Hao Yin, Jian Liang, Jianhua Sun, Kuan Li, Xiumei Liu | 2023-07-11 |
| 11326413 | Wire-line core drilling tool | Jian Liang, Kuan Li, Hao Yin, Xiumei Liu | 2022-05-10 |