Issued Patents 2020
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10723590 | Device and method for detecting compression and reposition performance of hydraulic buffer for elevator | Zhengwu Qi, Yuesheng Li, Yinghong Chen, Jiansheng Zeng | 2020-07-28 |