Issued Patents 2023
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11845631 | Synchronizing assembly for elevator door and elevator | Zhiren Liu, Meihong Mao, Yunbin Cai, Michael J. Tracey | 2023-12-19 |
| 11591189 | Coupling device between an elevator car door and a landing door and elevator system | Zhiren Liu | 2023-02-28 |