Issued Patents All Time
Showing 26–30 of 30 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6871955 | Spectacle lens and manufacturing method therefor | Tetsuma Yamakaji | 2005-03-29 |
| 6719658 | Support structure for planet gear in simple planetary gear mechanism and method for manufacturing the mechanism | Takashi Haga, Sueo Fukaya | 2004-04-13 |
| 6637880 | Spectacle lens and manufacturing method therefor | Tetsuma Yamakaji | 2003-10-28 |
| 5485399 | Spectacle lens supply method | Tsuyoshi Saigo, Takeo Koseki, Yoshihiro Kikuchi | 1996-01-16 |
| 4764547 | Rubber composition comprising surface-treated carbon black | Michitaka Takeshita | 1988-08-16 |