Issued Patents 2021
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10989051 | Multi-section non-pillar staggered protected roadway for deep inclined thick coal seam and method for coal pillar filling between sections | Yingyi ZHANG, Yanli Zhang, Shuangqi Tian, Jianjie Duan | 2021-04-27 |