Issued Patents All Time
Showing 201–225 of 228 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4807210 | Optical information processing apparatus | Toshimitsu Kaku, Kazuo Shigematsu, Yoshito Tsunoda | 1989-02-21 |
| 4802153 | Optical information processor and method for accessing rotating record carrier utilizing acousto-optic light deflector including holding a focus error signal during track jumping | Keiji Kataoka, Yoshito Tsunoda | 1989-01-31 |
| 4751695 | Method and apparatus for tracking servo system | Toshimitsu Kaku, Kazuo Shigematsu | 1988-06-14 |
| 4745587 | Eccentricity correction during optical head accessing of a desired track | Masuo Kasai, Koji Muraoka | 1988-05-17 |
| 4743774 | Method and apparatus for optical detection of information | Shigeru Nakamura, Hisataka Sugiyama, Kazuo Shigematsu, Atsushi Saito | 1988-05-10 |
| 4742218 | Focus error detection apparatus utilizing focusing an front and rear sides of focal planes | Shigeru Nakamura, Toshimasa Kamisada, Akira Saito, Yoshito Tsunoda, Toshimitsu Kaku +3 more | 1988-05-03 |
| 4731771 | Tracking servo setting method and apparatus | Kazuo Shigematsu, Shigeru Nakamura, Yoshito Tsunoda, Masuo Kasai | 1988-03-15 |
| 4725721 | Autofocusing control system | Shigeru Nakamura, Yoshito Tsunoda | 1988-02-16 |
| 4712203 | Method and apparatus for thermo magnetic recording/erasing information with preselected magnetic field switching | Atsushi Saito, Masahiro Ojima, Tsuyoshi Kato | 1987-12-08 |
| 4663751 | Optical information processor for compensating offset | Toshimitsu Kaku, Yoshito Tsunoda, Shigeru Nakamura | 1987-05-05 |
| 4650332 | Optical position detecting apparatus for positioning an actuator | Koji Muraoka, Masahiro Takasago, Tokuya Kaneda | 1987-03-17 |
| 4646103 | Optical recording method | Hisataka Sugiyama, Kazuo Shigematsu, Atsushi Saitoh, Wasao Takasugi | 1987-02-24 |
| 4607358 | Optical memory apparatus | Motoo Uno, Kouji Muraoka, Masahiro Takasago, Yasumitsu Mizoguchi, Tokuya Kaneko | 1986-08-19 |
| 4563760 | Method of detecting light spot control signal | Kazuo Shigematsu, Masahiro Takasago, Yasumitsu Mizoguchi, Zenji Tsutsumi, Yoshito Tsunoda +1 more | 1986-01-07 |
| 4554652 | Optical information processor | Yoshito Tsunoda, Takakazu Huno, Masahiro Takasago, Yasumitsu Mizoguchi | 1985-11-19 |
| 4550394 | System for optically recording information | Masahiro Takasago, Yoshito Tsunoda | 1985-10-29 |
| 4542491 | Optical information disc apparatus with autofocusing servo system | Masahiro Takasago, Motoo Uno, Yasumitsu Mizoguchi | 1985-09-17 |
| 4541083 | For jumping a light spot on a track of a recording medium | Motoo Uno, Masahiro Takasago | 1985-09-10 |
| 4532522 | Optical recording apparatus | Yoshito Tsunoda, Shigeru Nakamura, Toshimitsu Kaku | 1985-07-30 |
| 4525826 | Optical track position detecting apparatus and optical information processor using the same | Shigeru Nakamura, Yoshito Tsunoda, Kazuo Shigematsu, Toshimitsu Kaku, Tsuyoshi Kato | 1985-06-25 |
| 4523089 | Driving apparatus for semiconductor laser | Yasumitsu Mizoguchi, Masahiro Takasago, Tokuya Kaneda, Yoshito Tsunoda | 1985-06-11 |
| 4450547 | Focal position detecting optical apparatus | Shigeru Nakamura, Toshimitsu Kaku, Yoshito Tsunoda, Wasao Takasugi, Tokuya Kaneda | 1984-05-22 |
| 4410969 | Optical information playback apparatus | — | 1983-10-18 |
| 4364118 | Optical disk and optical information processor | Kazuo Shigematsu, Seiji Yonezawa | 1982-12-14 |
| 4352981 | Photoelectric focus and tracking apparatus | Toshio Sugiyama | 1982-10-05 |