Issued Patents 2022
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11396810 | Full-length screen pipe hole protection device and method with pressurized hole packing in soft coal seam | Guanhua Ni, Kai Dong, Weimin Cheng, Gang Wang, Yixin Liu +1 more | 2022-07-26 |