Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9022561 | Plastic optical product and plastic lens for spectacles | Hirotoshi Takahashi | 2015-05-05 |
| 8908275 | Optical product and spectacle plastic lens | Hirotoshi Takahashi, Koji Yamamoto | 2014-12-09 |
| 8746878 | Optical member, plastic lens for eyeglasses, and method for manufacturing the same | Hirotoshi Takahashi, Kazuyoshi Umemura | 2014-06-10 |
| 8746880 | Optical product and eyeglass plastic lens | Noboru Otani, Hirotoshi Takahashi | 2014-06-10 |
| 7926939 | Spectacle lens and spectacle | Yuji Kato, Hidenori Shoji | 2011-04-19 |