Issued Patents All Time
Showing 1–19 of 19 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7869311 | Built-in type optical disc apparatus | Shigehiko Takeshita, Mitsuo Kurokawa, Goshi Shiroishi | 2011-01-11 |
| RE39013 | Method and apparatus for optical recording and reproducing with tracking servo reducing track offset | Toshimitsu Kaku, Kazuo Shigematsu, Hisataka Sugiyama, Takeshi Maeda | 2006-03-14 |
| 5559768 | Tracking following apparatus for optical disk device | Masamichi Ito | 1996-09-24 |
| 5448543 | Apparatus for reproducing data from a regenerative signal using a PLH circuit having loop gain control | Takuya Mizokami, Noritaka Narita, Akira Takagishi, Toru Kawashima, Masanori Matsuzaki +1 more | 1995-09-05 |
| 5285435 | Controlling positioning of recording/reproducing head by combining a position differentiation and a drive current integration | — | 1994-02-08 |
| 5124967 | Automatic gain control method and apparatus in optical disk system | Kazuo Isaka, Kazuo Shigematsu, Osami Kushizaki, Takuya Mizokami | 1992-06-23 |
| 5105409 | Method and apparatus for optical recording and reproduction with tracking servo reducing track offset | Toshimitsu Kaku, Kazuo Shigematsu, Hisataka Sugiyama, Takeshi Maeda | 1992-04-14 |
| 4866687 | Optical disc access method and optical disk storage using coarse and fine actuators | Masuo Kasai, Takeshi Maeda, Kazuo Shigematsu, Toshimitsu Kaku | 1989-09-12 |
| 4853915 | Optical recording/reproducing method and apparatus for optical disk medium having unique control parameters | Shinichi Arai | 1989-08-01 |
| 4730290 | Defect detecting optical apparatus enabling recording in an alternate sector or track | Osami Kushizaki | 1988-03-08 |
| 4726004 | Optical information recording and reproducing apparatus with tracking servo system | Osami Kushizaki | 1988-02-16 |
| 4650332 | Optical position detecting apparatus for positioning an actuator | Koji Muraoka, Takeshi Maeda, Tokuya Kaneda | 1987-03-17 |
| 4607358 | Optical memory apparatus | Takeshi Maeda, Motoo Uno, Kouji Muraoka, Yasumitsu Mizoguchi, Tokuya Kaneko | 1986-08-19 |
| 4563760 | Method of detecting light spot control signal | Takeshi Maeda, Kazuo Shigematsu, Yasumitsu Mizoguchi, Zenji Tsutsumi, Yoshito Tsunoda +1 more | 1986-01-07 |
| 4554652 | Optical information processor | Takeshi Maeda, Yoshito Tsunoda, Takakazu Huno, Yasumitsu Mizoguchi | 1985-11-19 |
| 4550394 | System for optically recording information | Takeshi Maeda, Yoshito Tsunoda | 1985-10-29 |
| 4542491 | Optical information disc apparatus with autofocusing servo system | Takeshi Maeda, Motoo Uno, Yasumitsu Mizoguchi | 1985-09-17 |
| 4541083 | For jumping a light spot on a track of a recording medium | Takeshi Maeda, Motoo Uno | 1985-09-10 |
| 4523089 | Driving apparatus for semiconductor laser | Takeshi Maeda, Yasumitsu Mizoguchi, Tokuya Kaneda, Yoshito Tsunoda | 1985-06-11 |