Issued Patents 2021
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11060402 | Method for classifying phreatic leakage disaster level in shallow coal seam mining | Wenping Li, Weichi Chen, Zhi YANG, Qiqing Wang | 2021-07-13 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11060402 | Method for classifying phreatic leakage disaster level in shallow coal seam mining | Wenping Li, Weichi Chen, Zhi YANG, Qiqing Wang | 2021-07-13 |