Issued Patents 2022
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11268383 | Type of energy-absorbing rock bolt device with umbrella-shaped structure | Songfeng Guo, Shengwen Qi, Shishu Zhang, Xingdong Ma, Guoqing Yuan +10 more | 2022-03-08 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11268383 | Type of energy-absorbing rock bolt device with umbrella-shaped structure | Songfeng Guo, Shengwen Qi, Shishu Zhang, Xingdong Ma, Guoqing Yuan +10 more | 2022-03-08 |