Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12019312 | Spectacle lens | Chi Ho To, Siu Yin Lam, Takashi Hatanaka | 2024-06-25 |
| 11726348 | Spectacle lens | Chi Ho To, Siu Yin Lam, Takashi Hatanaka | 2023-08-15 |
| 11397335 | Spectacle lens | Chi Ho To, Siu Yin Lam, Takashi Hatanaka | 2022-07-26 |
| 11029540 | Spectacle lens and method of using a spectacle lens | Chi Ho To, Siu Yin Lam, Takashi Hatanaka | 2021-06-08 |
| 10268050 | Spectacle lens | Chi Ho To, Siu Yin Lam, Takashi Hatanaka | 2019-04-23 |