Issued Patents 2017
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9783948 | Root key type pressure bearing mechanism in anchor hole, root key type anchor cable and anchor hole grouting method | Hong Zheng, Yongtao Yang, Wei Li | 2017-10-10 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9783948 | Root key type pressure bearing mechanism in anchor hole, root key type anchor cable and anchor hole grouting method | Hong Zheng, Yongtao Yang, Wei Li | 2017-10-10 |