Issued Patents All Time
Showing 1–18 of 18 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5475660 | Optical information recording-reproducing method and apparatus including focusing and/or tracking control depending on a determined state of an optical spot | — | 1995-12-12 |
| 5436438 | Optical information recording and/or reproducing method and apparatus using card-like optical information recording medium | — | 1995-07-25 |
| 5247505 | Information recording method for reciprocally recording and verifying information | Fumiaki Kawaguchi, Kenichi Suzuki, Masayuki Usui, Hiroshi Matsuoka, Kazuhiko Matsuoka +4 more | 1993-09-21 |
| 5200937 | Apparatus for and method of recording and/or reproducing information by means of two actuators | Hideki Hosoya | 1993-04-06 |
| 5199016 | Method and apparatus for processing data | — | 1993-03-30 |
| 5163034 | Tracking device to effect tracking pull-in in an optical recording and reproducing apparatus by vibrating a light spot | Hiroto Kitai, Hideki Hosoya | 1992-11-10 |
| 5151888 | Optical information processing apparatus in which the output of an optical sensor is replaced by a reference signal during the occurrence of malfunction | Takashi Nakahara | 1992-09-29 |
| 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 | Shigeto Kanda | 1992-09-22 |
| 5146442 | Method and apparatus for effecting at least one of tracking and servo control when an error signal passes a zero-cross point and reaches a predetermined non-zero value | — | 1992-09-08 |
| 5029151 | Optical information processing apparatus including a limiter for limiting error of focusing and/or tracking actuators and a circuit for adjusting the limit range thereof | — | 1991-07-02 |
| 5018123 | Optical information recording medium and method for recording information on said medium and reproducing information therefrom | Hideki Hosoya, Akio Aoki, Masahiko Enari, Masayuki Usui, Hiroshi Matsuoka +4 more | 1991-05-21 |
| 5010534 | Optical information recording-reproducing apparatus | Masahiko Enari, Fumiaki Kawaguchi, Kenichi Suzuki, Masayuki Usui, Hiroshi Matsuoka +4 more | 1991-04-23 |
| 4922351 | Optical information recording and reproducing apparatus | Kenichi Suzuki, Fumiaki Kawaguchi, Masayuki Usui, Hiroshi Matsuoka, Kazuhiko Matsuoka +4 more | 1990-05-01 |
| 4912697 | Apparatus and method for preventing recording errors due to a reduction in the relative speed between an information carrying light beam and a recording medium | Masahiko Enari, Fumiaki Kawaguchi, Kenichi Suzuki, Masayuki Usui, Hiroshi Matsuoka +4 more | 1990-03-27 |
| 4888756 | Optical information recording and reproducing apparatus | Hideki Hosoya | 1989-12-19 |
| 4800546 | Optical information record/regenerating apparatus with device for prohibiting movement of optical head | Akio Aoki, Kazuo Minoura | 1989-01-24 |
| 4787075 | Optical information recording medium and apparatus for recording/reproducing information using the same | Hiroshi Matsuoka, Akio Aoki, Hideki Hosoya, Kazuhiko Matsuoka, Masayuki Usui +4 more | 1988-11-22 |
| 4785440 | Method and apparatus for driving an optical pickup of an optical information recording and reproducing apparatus | Akio Aoki, Kazuo Minoura | 1988-11-15 |