| 5483514 |
Optical information recording and/or reproducing apparatus |
— |
1996-01-09 |
| 5307338 |
Apparatus for recording and/or reproducing information |
Kazunori Suzuki, Tomoyuki Hiroki, Hideki Hosoya |
1994-04-26 |
| 5206847 |
Information recording disk, and information recording/reproducing method and apparatus utilizing the same |
— |
1993-04-27 |
| 5199023 |
Optical information recording medium with a separating part between information tracks |
Masakuni Yamamoto |
1993-03-30 |
| 5150345 |
Optical information recording apparatus provided with means for sampling and holding a servo signal when the intensity of a light beam varies between intensity levels |
Satoshi Shikichi |
1992-09-22 |
| 5067118 |
Position detecting device for use by switching plural alternating signals having different phases from each other |
— |
1991-11-19 |
| 4982393 |
Information recording and/or reproducing apparatus provided with means for detecting abnormality of tracking servo |
Machiko Matsushita, Eiji Yamaguchi |
1991-01-01 |
| 4982394 |
Optical information recording/reproducing apparatus |
Hiroto Kitai, Etsuo Yamada |
1991-01-01 |
| 4831613 |
Method and apparatus for reproducing recorded information by processing plural read-out signals obtained from plural sources acting on an information carrying member |
— |
1989-05-16 |
| 4788671 |
Information recording and reproducing apparatus for effecting simultaneous recording and reproduction but at different rates |
— |
1988-11-29 |
| 4712206 |
Tracking error signal detecting device with a two-beam system for use in an optical information memory |
— |
1987-12-08 |
