Issued Patents 2021
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11060402 | Method for classifying phreatic leakage disaster level in shallow coal seam mining | Weichi Chen, Zhi YANG, Qiqing Wang, Kaifang Fan | 2021-07-13 |
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11060402 | Method for classifying phreatic leakage disaster level in shallow coal seam mining | Weichi Chen, Zhi YANG, Qiqing Wang, Kaifang Fan | 2021-07-13 |