Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12064841 | Device for installing retaining ring on shaft | Guanjun Jin | 2024-08-20 |
| 10794184 | Recyclable sand-consolidated anchor head prestressed anchor, anchorage jack and its application method | Guanhua Sun, Yinghao SUN, SHAN-HENG LIN, Hong Zheng, Chunguang Li +4 more | 2020-10-06 |
| 10189680 | Landing-door door lock device | Huanfeng Liu, Chong Chen, Hua Zhang, QingXi Cai, Junfeng Wu | 2019-01-29 |
| 9783948 | Root key type pressure bearing mechanism in anchor hole, root key type anchor cable and anchor hole grouting method | Guanhua Sun, Hong Zheng, Wei Li | 2017-10-10 |