Issued Patents All Time
Showing 1–16 of 16 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7463560 | Optical disc device | — | 2008-12-09 |
| 7359293 | Optical pickup device | Shigeharu Shirane | 2008-04-15 |
| 6574182 | Optical pickup compatible with a plurality of types of optical disks having different thicknesses | Masato Yamada, Seiji Kajiyama, Yoichi Tsuchiya | 2003-06-03 |
| 6552990 | Optical head for two different disk thicknesses with a light beam diameter control device | Seiji Kajiyama, Yoichi Tsuchiya, Masato Yamada, Shuichi Ichiura | 2003-04-22 |
| 6321028 | Optical disk recording/reproduction apparatus for recording/reproducing information to/from optical disk of different standards | Seiji Kajiyama, Yoichi Tsuchiya, Shuichi Ichiura, Hitotoshi Kimura, Toshio Harada +1 more | 2001-11-20 |
| 6201777 | Apparatus for discriminating optical recording media of different thicknesses from each other and reproducing information therefrom | Yoichi Tsuchiya, Seiji Kajiyama, Shuichi Ichiura, Koichi Tada, Masami Shimizu +1 more | 2001-03-13 |
| 6181668 | Optical pickup device and wavelength selective diffraction grating | Seiji Kajiyama, Masato Yamada, Yoichi Tsuchiya, Shuichi Ichiura | 2001-01-30 |
| 6167019 | Optical Disc cd recording/reproducing apparatus recording/reproducing information to/from optical discs according to different standards | Yoichi Tsuchiya, Seiji Kajiyama, Shuichi Ichiura | 2000-12-26 |
| 6160783 | Optical pick-up device | Yoichi Tsuchiya, Seiji Kajiyama, Koichi Tada | 2000-12-12 |
| 6137764 | Optical disc recording/reproducing apparatus recording/reproducing information to/from optical discs according to different standards | Yoichi Tsuchiya, Seiji Kajiyama, Shuichi Ichiura | 2000-10-24 |
| 6122242 | Optical disc recording/reproducing apparatus recording/reproducing information to/from optical discs according to different standards | Yoichi Tsuchiya, Seiji Kajiyama, Shuichi Ichiura | 2000-09-19 |
| 6049518 | Optical disc recording/reproducing apparatus recording/reproducing information to/from optical discs according to different standards | Yoichi Tsuchiya, Seiji Kajiyama, Shuichi Ichiura | 2000-04-11 |
| 6025866 | Superresolution optical pickup apparatus | Yoichi Tsuchiya, Seiji Kajiyama, Koichi Tada, Katsutoshi Hibino, Shigeki Hori | 2000-02-15 |
| 5917791 | Apparatus for discriminating optical recording media of different thicknesses from each other and reproducing information therefrom | Yoichi Tsuchiya, Seiji Kajiyama, Shuichi Ichiura, Koichi Tada, Masami Shimizu +1 more | 1999-06-29 |
| 5856965 | Optical disc readout apparatus for different types of optical discs | Yoichi Tsuchiya, Seiji Kajiyama | 1999-01-05 |
| 5787061 | Optical disc recording reproducing apparatus recording/reproducing information to/from optical discs according to different standards | Yoichi Tsuchiya, Seiji Kajiyama, Shuichi Ichiura | 1998-07-28 |