Issued Patents 2020
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10731397 | Barrier control system with auxiliary power supply and auxiliary power supply for barrier control system | Philip Y. W. Tsui | 2020-08-04 |
| 10533361 | Wireless infrared safety sensor for garage door opener system | Philip Y. W. Tsui | 2020-01-14 |