Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12168931 | Mining method without coal pillars with roof-cutting and roadway retaining | Jiong Wang, Wenfei Li, Guangyuan Yu | 2024-12-17 |
| 12168932 | Three-dimensional ventilation method and system for mining by 110 construction method in coal and gas outburst mines | Jiong Wang, Wenfei Li, Guangyuan Yu, Manchao He, Gonghua Chen +1 more | 2024-12-17 |
| 11774220 | Annular shaped-charge housing for blasting and method of using the same | Fujiao Chu, Wentao Lan, Gongcheng Li, Zhihe LIU | 2023-10-03 |