Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8256893 | Holding structures for spectacle lenses, spectacles, and method of manufacturing spectacles | Norihisa Onoda, Asako Kawano, Yasushi Sakai | 2012-09-04 |
| 6736506 | Eyeglasses made-to-order system | Toshihisa Akaba, Isao Iizuka, Yasushi Sakai, Shigeru Watanabe | 2004-05-18 |
| 6561738 | Spectacles lens boring jig positioning device | Hakaru Fujita | 2003-05-13 |
| 6533418 | System for making spectacles to order | Toshihisa Akaba, Isao Iizuka, Yasushi Sakai, Shigeru Watanabe | 2003-03-18 |
| 6340226 | Spectacles accommodating interchangeable/replaceable lens | Toshihisa Akaba, Kazumichi Kurihara, Yasushi Sakai, Hakaru Fujita, Youichi Ishiguro +1 more | 2002-01-22 |
| 5646706 | Spectacle lens holding structure | — | 1997-07-08 |