Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11325810 | Traction sheave safety device and elevator car emergency stop method thereof | Jianwen Cao, He Zhang, Wei Zhou, Yu Cao, Weike Zhang +2 more | 2022-05-10 |
| 8210325 | Disk brake with an improved structure | Jianwen Cao, He Zhang, Yesheng Qu, Wei Zhou | 2012-07-03 |
| 8091691 | Disk brake | Yesheng Qu, Jianwen Cao, He Zhang, Wei Zhou | 2012-01-10 |