Issued Patents All Time
Showing 1–14 of 14 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12019312 | Spectacle lens | Chi Ho To, Takashi Hatanaka, Yasutake Masuda | 2024-06-25 |
| 11726348 | Spectacle lens | Chi Ho To, Takashi Hatanaka, Yasutake Masuda | 2023-08-15 |
| 11397335 | Spectacle lens | Chi Ho To, Takashi Hatanaka, Yasutake Masuda | 2022-07-26 |
| 11029540 | Spectacle lens and method of using a spectacle lens | Chi Ho To, Takashi Hatanaka, Yasutake Masuda | 2021-06-08 |
| 10898407 | Methods and viewing systems for inhibiting ocular refractive disorders from progressing | Yan Yin Tse, Chi Ho To | 2021-01-26 |
| 10268050 | Spectacle lens | Chi Ho To, Takashi Hatanaka, Yasutake Masuda | 2019-04-23 |
| 10231897 | Methods, devices, and systems for inhibiting ocular refractive disorders from progressing | Yan Yin Tse, Chi Ho To | 2019-03-19 |
| RE47006 | Lens for optical treatment | Chi Ho To, Yan Yin Tse | 2018-08-28 |
| 9918894 | Methods and viewing systems for inhibiting ocular refractive disorders from progressing | Yan Yin Tse, Chi Ho To | 2018-03-20 |
| 9829722 | Method and system for retarding the progression of myopia | Yan Yin Tse, Chi Ho To | 2017-11-28 |
| 8950860 | Method and system for retarding the progression of myopia | Yan Yin Tse, Chi Ho To | 2015-02-10 |
| RE45147 | Lens for optical treatment | Chi Ho To, Yan Yin Tse | 2014-09-23 |
| RE43851 | Method of optical treatment | Chi Ho To, Yan Yin Tse | 2012-12-11 |
| 7506983 | Method of optical treatment | Chi Ho To, Shau Kei Wan | 2009-03-24 |