Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10977756 | Location based quality assurance system | Kwong Yip Cheng, Kam Chuen Yeung, Wai Kei Leung | 2021-04-13 |
| 6817745 | Optical means primarily for decorative applications and articles including same | Kwok Piu Yeung | 2004-11-16 |