Issued Patents 2003
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6572451 | Spectacle lens machining method and apparatus | Hakaru Fujita, Yasushi Sakai | 2003-06-03 |
| 6533418 | System for making spectacles to order | Yukihiro Izumitani, Toshihisa Akaba, Yasushi Sakai, Shigeru Watanabe | 2003-03-18 |