Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7820093 | Method for processing stamp material | Kin Sun Wong, Hin Wah Wallace Tsang, Kam Kwong Raymond Wan | 2010-10-26 |
| D513036 | Stamp | Wallace Hin Wah Tsang | 2005-12-20 |
| 5589965 | Wide viewing-angle dye-doped TN LCD with retardation films | Birendra Bahadur | 1996-12-31 |
| 5438929 | Printing stamp | Kin Sun Wong | 1995-08-08 |