Issued Patents All Time
Showing 101–125 of 169 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6146734 | Optical recording disk and method for manufacturing the same | Eiji Ohno, Yoshitaka Sakaue, Kenichi Nagata, Nobuo Akahira, Masahide Yokoyama +1 more | 2000-11-14 |
| 6143469 | Optical information recording medium and manufacturing method | Hiroyuki Ohta, Yoshitaka Sakaue, Eiji Ohno | 2000-11-07 |
| 6060221 | Method and apparatus for initializing optical recording medium | Shigeaki Furukawa, Katsumi Kawahara, Kenichi Nishiuchi | 2000-05-09 |
| 6033535 | Optical information recording disk and method for manufacturing the same | Eiji Ohno, Yoshitaka Sakaue, Kenichi Nagata, Nobuo Akahira, Masahide Yokoyama +1 more | 2000-03-07 |
| 5956308 | Data storage apparatus | Nobuo Akahira, Kenichi Nishiuchi, Eiji Ohno, Kenichi Nagata | 1999-09-21 |
| 5914214 | Method for manufacturing an optical information recording medium | Hiroyuki Ohta, Yoshitaka Sakaue, Eiji Ohno | 1999-06-22 |
| 5811217 | Optical information recording medium and optical information recording/reproducing method | Nobuo Akahira, Kenichi Nagata, Eiji Ohno, Kenichi Nishiuchi | 1998-09-22 |
| 5768233 | Data storage apparatus for recording and reproducing information on a recording medium by rotating the medium at different zone recording angular velocities and a reading angular velocity during a stand-by mode | Nobuo Akahira, Kenichi Nishiuchi, Eiji Ohno, Kenichi Nagata | 1998-06-16 |
| 5750228 | Optical information storage medium | Yoshitaka Sakaue, Eiji Ohno, Kazuhisa Ide, Kenichi Nagata | 1998-05-12 |
| 5729513 | Data storage apparatus for recording and reproducing information on a recording medium by rotating the recording medium at different angular velocities | Nobuo Akahira, Kenichi Nishiuchi, Eiji Ohno, Kenichi Nagata | 1998-03-17 |
| 5684778 | Initialization process for a phase change recording medium with a zero level drop in flash light emission | Katsumi Kawahara, Shigeaki Furukawa | 1997-11-04 |
| 5681632 | Optical information recording medium | Hideki Kitaura, Tetsuya Akiyama, Takeo Ohta, Ken'ichi Nagata, Katsumi Kawahara | 1997-10-28 |
| 5663852 | Disk drive device | Kazuyoshi Fujimori | 1997-09-02 |
| 5635267 | Optical information recording medium of phase change type having variably grooved tracks depending on their radial locations | Kenichi Nishiuchi, Shigeaki Furukawa, Nobuo Akahira, Eiji Ohno, Kenichi Nagata +1 more | 1997-06-03 |
| 5545454 | Optical information recording medium and method of designing its structure | Nobuo Akahira, Kenichi Nishiuchi, Kenichi Nagata, Eiji Ohno, Shigeaki Furukawa | 1996-08-13 |
| 5527661 | Optical information recording medium | Nobuo Akahira, Eiji Ohno, Kenichi Nishiuchi, Kenichi Nagata, Yoshitaka Sakaue | 1996-06-18 |
| 5517485 | Optical information recording medium having first and second tracks and apparatus for recording to and reproducing from the medium | Kenichi Nishiuchi, Nobuo Akahira, Eiji Ohno | 1996-05-14 |
| 5505835 | Method for fabricating optical information storage medium | Yoshitaka Sakaue, Eiji Ohno, Kazuhisa Ide, Kenichi Nagata | 1996-04-09 |
| 5493561 | Optical information recording medium and information recording and reproducing method thereof | Kenichi Nishiuchi, Nobuo Akahira, Eiji Ohno, Ken'ichi Nagata | 1996-02-20 |
| 5453346 | Optical information recording medium having protection layers with different properties on both sides of an optical active layer | Katsumi Kawahara, Shigeaki Furukawa | 1995-09-26 |
| 5449589 | Method of making an optical information recording medium and method of recording/reproducing optical information | Ken'ichi Nagata, Kenichi Nishiuchi | 1995-09-12 |
| 5424106 | Optical information recording medium and method of designing its structure | Nobuo Akahira, Kenichi Nishiuchi, Kenichi Nagata, Eiji Ohno, Shigeaki Furukawa | 1995-06-13 |
| 5412626 | Method of recording optical information with selective correction in pulse waveform and a recording system therefor | Eiji Ohno, Kenichi Nishiuchi, Kenichi Nagata, Nobuo Akahira | 1995-05-02 |
| 5410534 | Optical information recording medium | Ken'ichi Nagata, Eiji Ohno, Nobuo Akahira, Ken'ichi Nishiuchi | 1995-04-25 |
| 5395735 | Optical information recording medium and method of manufacture | Kenichi Nagata, Eiji Ohno | 1995-03-07 |