Issued Patents All Time
Showing 101–125 of 144 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5835650 | Optical apparatus and method for producing the same | Yasuo Kitaoka, Kazuhisa Yamamoto, Makoto Kato, Tomoaki Uno, Kiminori Mizuuchi | 1998-11-10 |
| 5811217 | Optical information recording medium and optical information recording/reproducing method | Nobuo Akahira, Kenichi Nagata, Eiji Ohno, Noboru Yamada | 1998-09-22 |
| 5768251 | Optical recording/reproducing apparatus for high density multilayered disks | Noboru Ito, Shinichi Tanaka, Sadao Mizuno | 1998-06-16 |
| 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, Eiji Ohno, Kenichi Nagata, Noboru Yamada | 1998-06-16 |
| 5764619 | Optical recording medium having two separate recording layers | Ken'ichi Nagata, Nobuo Akahira | 1998-06-09 |
| 5745475 | Optical information recording medium | Eiji Ohno, Yoshitaka Sakaue, Kazuhisa Ide, Naoyasu Miyagawa, Nobuo Akahira | 1998-04-28 |
| 5745467 | Optical information recording method and apparatus | Yoshitaka Sakaue, Eiji Ohno | 1998-04-28 |
| 5729513 | Data storage apparatus for recording and reproducing information on a recording medium by rotating the recording medium at different angular velocities | Nobuo Akahira, Eiji Ohno, Kenichi Nagata, Noboru Yamada | 1998-03-17 |
| 5635267 | Optical information recording medium of phase change type having variably grooved tracks depending on their radial locations | Noboru Yamada, Shigeaki Furukawa, Nobuo Akahira, Eiji Ohno, Kenichi Nagata +1 more | 1997-06-03 |
| 5627816 | Multilayer optical disk and apparatus | Noboru Ito, Shinichi Tanaka, Sadao Mizuno | 1997-05-06 |
| 5568461 | Optical information recording and reproducing apparatus | Noyasu Miyagawa, Eiji Ohno, Nobuo Akahira | 1996-10-22 |
| 5563873 | Multilayer optical disk and apparatus | Noboru Ito, Shinichi Tanaka, Sadao Mizuno | 1996-10-08 |
| 5545454 | Optical information recording medium and method of designing its structure | Noboru Yamada, Nobuo Akahira, Kenichi Nagata, Eiji Ohno, Shigeaki Furukawa | 1996-08-13 |
| 5527661 | Optical information recording medium | Nobuo Akahira, Eiji Ohno, Kenichi Nagata, Yoshitaka Sakaue, Noboru Yamada | 1996-06-18 |
| 5517485 | Optical information recording medium having first and second tracks and apparatus for recording to and reproducing from the medium | Nobuo Akahira, Noboru Yamada, Eiji Ohno | 1996-05-14 |
| 5493561 | Optical information recording medium and information recording and reproducing method thereof | Nobuo Akahira, Noboru Yamada, Eiji Ohno, Ken'ichi Nagata | 1996-02-20 |
| 5449589 | Method of making an optical information recording medium and method of recording/reproducing optical information | Noboru Yamada, Ken'ichi Nagata | 1995-09-12 |
| 5448551 | Optical information recording media and optical information read/write device | Naoyasu Miyagawa, Eiji Ohno | 1995-09-05 |
| 5424106 | Optical information recording medium and method of designing its structure | Noboru Yamada, Nobuo Akahira, 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 Nagata, Noboru Yamada, Nobuo Akahira | 1995-05-02 |
| 5348783 | Optical information recording medium | Eiji Ohno, Noboru Yamada, Kenichi Nagata, Nobuo Akahira | 1994-09-20 |
| 5346740 | Optical information recording medium | Eiji Ohno, Noboru Yamada, Kenichi Nagata, Nobuo Akahira | 1994-09-13 |
| 5305297 | Method for determining optimum irradiation conditions in optical data recording | Eiji Ohno, Noboru Yamada, Nobuo Akahira | 1994-04-19 |
| 5305303 | Optical information recording medium | Nobuo Akahira, Eiji Ohno, Kenichi Nagata, Noboru Yamada | 1994-04-19 |
| 5291470 | Optical information recording method | Noboru Yamada | 1994-03-01 |