Issued Patents 2021
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11203925 | Drilling device at extracting opening for extraction of coalbed methane | Shu Tao, Hao Xu, Song Li, Shida Chen | 2021-12-21 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11203925 | Drilling device at extracting opening for extraction of coalbed methane | Shu Tao, Hao Xu, Song Li, Shida Chen | 2021-12-21 |