Issued Patents 2021
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11046553 | Elevator automatic rescue and energy-saving device and control method for same and super capacitor module | Eric Ka Wai Cheng, Eugene Y. Chan, Lok Yan Lorraine Chan | 2021-06-29 |