Issued Patents 2017
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9714891 | Rock fixing device with hydraulic-spring combination and position-limiting chuck for direct tensile test | Jianfeng Liu, Heping Xie, Yang Ju, Huining Xu, Lu Wang +3 more | 2017-07-25 |
| 9574980 | Position-limit device with spring components for direct tensile test | Jianfeng Liu, Heping Xie, Yang Ju, Yong Xiang, Huining Xu +3 more | 2017-02-21 |