Issued Patents 2020
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10544613 | Security-enhanced garage door opener system | Gallen Ka Leung Tsui | 2020-01-28 |
| 10533361 | Wireless infrared safety sensor for garage door opener system | Gallen K.L. TSUI | 2020-01-14 |