Issued Patents All Time
Showing 26–42 of 42 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6514591 | Optical information recording medium | Noboru Yamada | 2003-02-04 |
| 6487151 | Optical information recording and reproducing system with overwrite capability and recording medium for use therewith | Kenichi Nishiuchi, Eiji Ohno, Nobuo Akahira, Kenji Narumi | 2002-11-26 |
| 6456584 | Optical information recording medium comprising a first layer having a phase that is reversibly changeable and a second information layer having a phase that is reversibly changeable | Kenichi Nishiuchi, Noboru Yamada, Nobuo Akahira | 2002-09-24 |
| 6449239 | Optical information recording medium with thermal diffusion layer | Mayumi Uno, Noboru Yamada, Hideo Kusada | 2002-09-10 |
| 6434095 | Optical information recording medium, manufacturing method therefor, manufacturing apparatus therefor, and optical information recording and reproducing apparatus | Kenichi Nishiuchi, Nobuo Akahira | 2002-08-13 |
| 6388984 | Optical information recording medium and its recording and reproducing method | Hideki Kitaura, Noboru Yamada, Kenichi Nishiuchi, Shigeaki Furukawa | 2002-05-14 |
| 6229785 | Optical information recording medium, its manufacturing method, optical information recording/reproducing method and optical information recorder/reproducer | Hideki Kitaura, Noboru Yamada, Kenichi Nishiuchi | 2001-05-08 |
| 6226239 | Optical information recording and reproducing apparatus for multiple layer recording medium | Kenichi Nishiuchi, Nobuo Akahira | 2001-05-01 |
| 6031814 | Optical disk with stop-pulse generating means in a guide groove | Kenichi Nishiuchi, Eiji Ohno, Nobuo Akahira, Kenji Narumi | 2000-02-29 |
| 6027594 | Method of manufacturing optical information recording medium | Kenichi Nishiuchi, Nobuo Akahira | 2000-02-22 |
| 5764619 | Optical recording medium having two separate recording layers | Kenichi Nishiuchi, Nobuo Akahira | 1998-06-09 |
| 5681632 | Optical information recording medium | Hideki Kitaura, Tetsuya Akiyama, Takeo Ohta, Katsumi Kawahara, Noboru Yamada | 1997-10-28 |
| 5493561 | Optical information recording medium and information recording and reproducing method thereof | Kenichi Nishiuchi, Nobuo Akahira, Noboru Yamada, Eiji Ohno | 1996-02-20 |
| 5449589 | Method of making an optical information recording medium and method of recording/reproducing optical information | Noboru Yamada, Kenichi Nishiuchi | 1995-09-12 |
| 5410534 | Optical information recording medium | Eiji Ohno, Nobuo Akahira, Ken'ichi Nishiuchi, Noboru Yamada | 1995-04-25 |
| 5273861 | Optical information recording medium, method of making an optical information recording medium and method of recording/reproducing optical information | Noboru Yamada, Kenichi Nishiuchi | 1993-12-28 |
| 5249175 | Optical information recording medium and information recording and reproducing method therefor | Nobuo Akahira, Kenichi Nishiuchi | 1993-09-28 |