Issued Patents All Time
Showing 51–62 of 62 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 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, Yasuaki Ootera, Hideo Ando +1 more | 2011-01-04 |
| 7778144 | Optical recording medium, information recording method, and information reproducing method | Koji Takazawa, Seiji Morita, Kazuyo Umezawa, Yasuaki Ootera, Hideo Ando +1 more | 2010-08-17 |
| 7715304 | Optical recording medium, information recording method, and information reproducing method | Koji Takazawa, Seiji Morita, Kazuyo Umezawa, Yasuaki Ootera, Hideo Ando +1 more | 2010-05-11 |
| 7471601 | Optical disk recording/reproducing method, optical disk recording/reproducing apparatus and optical disk | Yutaka Kashihara, Akihito Ogawa, Masaki Nakano, Masatsugu Ogawa, Shuichi Ookubo +1 more | 2008-12-30 |
| 7400570 | Optical disk | Yasuaki Ootera, Seiji Morita | 2008-07-15 |
| 6296915 | Optical recording medium | Keiichiro Yusu, Sumio Ashida, Akira Kikitsu, Toshihiko Nagase, Katsutaro Ichihara +2 more | 2001-10-02 |
| 5776574 | Optical recording medium and optical recording/reproducing apparatus | Yoshinori Honguh, Toyoki Taguchi, Hiroshi Hasegawa, Tadashi Kobayashi, Naomasa Nakamura | 1998-07-07 |
| 5474826 | Optical recording medium and optical recording/reproducing apparatus | Yoshinori Honguh, Toyoki Taguchi, Hiroshi Hasegawa, Tadashi Kobayashi, Naomasa Nakamura | 1995-12-12 |
| 5431975 | Optical recording medium and optical recording/reproducing apparatus | Yoshinori Honguh, Toyoki Taguchi, Hiroshi Hasegawa, Tadashi Kobayashi, Naomasa Nakamura | 1995-07-11 |
| 5431978 | Information recording medium and recording method using the same | Naomasa Nakamura | 1995-07-11 |
| 5396480 | Method and apparatus for recording information using an energy beam of power levels changed stepwise | Naomasa Nakamura, Katsumi Suzuki, Tadashi Kobayashi | 1995-03-07 |