Issued Patents 2022
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11339658 | Method for recovering room-type coal pillars by cemented filling of reserved roadways | Nan Zhou, Meng Li, Hao Yan, Jixiong Zhang | 2022-05-24 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11339658 | Method for recovering room-type coal pillars by cemented filling of reserved roadways | Nan Zhou, Meng Li, Hao Yan, Jixiong Zhang | 2022-05-24 |