Issued Patents All Time
Showing 1–3 of 3 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 |
| 10392230 | System and method for testing an escalator | Zhengwu Qi, Yuhang Su, Yinghong Chen | 2019-08-27 |
| 10023440 | System and method for measuring safety clearance between the steps and skirt panels of an escalator and positioning hidden dangers | Zhengwu Qi, Yinghong Chen | 2018-07-17 |