Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11697970 | Directly connected drill pipe applicable to extreme conditions | Hao Yin, Jian Liang, Xinmiao Li, Jianhua Sun, Xiumei Liu | 2023-07-11 |
| 11326413 | Wire-line core drilling tool | Xinmiao Li, Jian Liang, Hao Yin, Xiumei Liu | 2022-05-10 |
| 7798810 | High pressure hot gas generating device | — | 2010-09-21 |