Issued Patents 2021
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11041385 | Mining hydraulic constant-resistance deforming and automatic pressure relieving anchor rod and working method thereof | Hua Nan, Longfei Nan, Yingming Wen, Zhiqiang Han | 2021-06-22 |
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11041385 | Mining hydraulic constant-resistance deforming and automatic pressure relieving anchor rod and working method thereof | Hua Nan, Longfei Nan, Yingming Wen, Zhiqiang Han | 2021-06-22 |