Issued Patents 2021
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11143025 | Mine exploitation based on stoping, separation and filling control | Qiang Zhang, Zhongyu WU, Feng Ju, Jiaqi Wang, Yang Chen | 2021-10-12 |
| 11021954 | Method of recovering room-and-pillar coal pillar by using external replacement supports | Nan Zhou, Hengfeng Liu, Meng Li, Zhongya Wu | 2021-06-01 |
| 10895154 | Base mechanism of single prop capable of being unloaded at reduced pressure | Qiang Zhang, Zhongya Wu, Wenyue Qi, Hong YAN, Meng Li | 2021-01-19 |