Issued Patents 2019
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10401649 | Method of designing progressive refractive power lens, and lens set | Ayumu Ito | 2019-09-03 |
| 10288903 | Progressive addition lens | Tadashi Kaga, Toshihide Shinohara, Ayumu Ito | 2019-05-14 |