Issued Patents 2025
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12338721 | Coal mining system and method of dual circulation drilling with mechanical reaming and abrasive jet | Yifan Zeng, Donghui Yang, Qiang Wu, Zilong Yuan, Hao Li +2 more | 2025-06-24 |
| 12241371 | Integrated mining method of coal breaking, coal extraction and water circulation in U-well and system thereof | Yifan Zeng, Donghui Yang, Qiang Wu, Hao Li, Junhao Ren +2 more | 2025-03-04 |