Issued Patents All Time
Showing 26–50 of 67 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8149672 | Optical recording medium, information recording method, and information reproducing method | Koji Takazawa, Seiji Morita, Kazuyo Umezawa, Naoki Morishita, Yasuaki Ootera +1 more | 2012-04-03 |
| 8139459 | Optical recording medium, information recording method, and information reproducing method | Koji Takazawa, Seiji Morita, Kazuyo Umezawa, Naoki Morishita, Yasuaki Ootera +1 more | 2012-03-20 |
| 8137894 | Storage medium, reproducing method, and recording method | Seiji Morita, Koji Takazawa, Kazuyo Umezawa, Hideo Ando, Yasuaki Ootera +1 more | 2012-03-20 |
| 8134899 | Optical recording medium, information recording method, and information reproducing method | Koji Takazawa, Seiji Morita, Kazuyo Umezawa, Naoki Morishita, Yasuaki Ootera +1 more | 2012-03-13 |
| 8059523 | Optical recording medium for writing data using multiple pulses | Kazuyo Umezawa, Seiji Morita, Koji Takazawa, Naoki Morishita, Shinichi Katsuda | 2011-11-15 |
| 7995442 | Optical recording medium, information recording method, and information reproducing method | Koji Takazawa, Seiji Morita, Kazuyo Umezawa, Naoki Morishita, Yasuaki Ootera +1 more | 2011-08-09 |
| 7949071 | Signal processing system and information storage medium | Yuji Nagai, Chosaku Noda, Kazuo Watabe, Akihito Ogawa, Kazuto Kuroda +7 more | 2011-05-24 |
| 7885173 | Write-once information recording medium and disk apparatus | Seiji Morita, Koji Takazawa, Kazuyo Umezawa, Naoki Morishita | 2011-02-08 |
| 7876666 | Write-once information recording medium and coloring matter material therefor | Seiji Morita, Koji Takazawa, Naoki Morishita | 2011-01-25 |
| 7869339 | Multi-layer optical disc, information recording method and information reproducing method | Kazuyo Umezawa, Seiji Morita, Koji Takazawa, Hideo Ando, Yasuaki Ootera +1 more | 2011-01-11 |
| 7864654 | Optical recording medium, information recording method, and information reproducing method | Koji Takazawa, Seiji Morita, Kazuyo Umezawa, Naoki Morishita, Yasuaki Ootera +1 more | 2011-01-04 |
| 7858166 | Phase change recording medium | Tsukasa Nakai, Noritake Oomachi, Sumio Ashida, Keiichiro Yusu, Yasuhiro Satoh | 2010-12-28 |
| 7778144 | Optical recording medium, information recording method, and information reproducing method | Koji Takazawa, Seiji Morita, Kazuyo Umezawa, Naoki Morishita, Yasuaki Ootera +1 more | 2010-08-17 |
| 7767285 | Phase-change optical recording medium | Tsukasa Nakai, Sumio Ashida, Keiichiro Yusu, Takayuki Tsukamoto, Noritake Oomachi +1 more | 2010-08-03 |
| 7736715 | Optical recording medium, and information recording/playback apparatus and method using the medium | Tsukasa Nakai, Noritake Oomachi, Sumio Ashida, Keiichiro Yusu, Yasuhiro Satoh | 2010-06-15 |
| 7715304 | Optical recording medium, information recording method, and information reproducing method | Koji Takazawa, Seiji Morita, Kazuyo Umezawa, Naoki Morishita, Yasuaki Ootera +1 more | 2010-05-11 |
| 7643397 | Phase-change optical recording media and optical recording-reproducing apparatus | Tsukasa Nakai, Yasuaki Ootera, Sumio Ashida, Keiichiro Yusu, Nobuhisa Yoshida +1 more | 2010-01-05 |
| 7570566 | Optical disc, optical disc manufacturing method, and optical disc apparatus | Toshihiro Sugaya, Masato Otsuka, Nobuhisa Yoshida, Hisashi Yamada | 2009-08-04 |
| 7510753 | Phase-change optical recording media | Tsukasa Nakai, Sumio Ashida, Keiichiro Yusu, Noritake Oomachi | 2009-03-31 |
| 7477592 | Optical disc, optical disc apparatus, optical disk reproducing method, and digital work publication | Toshihiro Sugaya, Nobuhisa Yoshida, Masato Otsuka | 2009-01-13 |
| 7455951 | Information recording medium and its manufacturing method | Katsutaro Ichihara, Sumio Ashida, Keiichiro Yusu, Toshihiko Nagase | 2008-11-25 |
| 7357969 | Phase-change optical recording medium | Katsutaro Ichihara, Sumio Ashida, Keiichiro Yusu, Takayuki Tsukamoto, Noritake Oomachi +1 more | 2008-04-15 |
| 7335459 | Phase-change optical recording medium | Sumio Ashida, Takayuki Tsukamoto, Keiichiro Yusu, Katsutaro Ichihara, Noritake Ohmachi +1 more | 2008-02-26 |
| 7294382 | Phase-change optical recording medium | Tsukasa Nakai, Sumio Ashida, Keiichiro Yusu, Takayuki Tsukamoto, Noritake Oomachi +1 more | 2007-11-13 |
| 7291375 | Phase-change optical recording medium | Katsutaro Ichihara, Sumio Ashida, Keiichiro Yusu, Takayuki Tsukamoto, Noritake Oomachi +1 more | 2007-11-06 |