Issued Patents All Time
Showing 1–14 of 14 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8257813 | Information recording medium | Kazuo Kuroda, Eiji Muramatsu | 2012-09-04 |
| 7848215 | Optical recording medium, information recording apparatus and information reproduction apparatus | Seiro Oshima, Masataka Yamaguchi, Takao Tagiri | 2010-12-07 |
| 7768901 | Optical disc | Seiro Oshima, Eiji Muramatsu, Hiroshi Nishiwaki | 2010-08-03 |
| 7260052 | Information recording medium | Masahiro Kato, Tatsuhiro Yone, Atsushi Yamaguchi, Eiji Muramatsu, Shoji Taniguchi +2 more | 2007-08-21 |
| 7230899 | Rewritable type optical disc including recording marks over break portions of recording tracks, manufacturing method and manufacturing system therefor | Eiji Muramatsu, Masahiro Kato, Yoshio Sasaki, Haruyasu Sakata | 2007-06-12 |
| 6692809 | Optical recording medium | Makoto Matsukawa, Seiro Oshima | 2004-02-17 |
| 6687213 | Optical recording medium having pre-formed land-prepits and method for producing same | Masahiro Kato, Eiji Muramatsu, Kunihiko Horikawa, Shoji Taniguchi, Atsushi Yamaguchi | 2004-02-03 |
| 6599607 | Optical recording medium | Masahiro Kato, Eiji Muramatsu, Kunihiko Horikawa, Shoji Taniguchi, Atsushi Yamaguchi | 2003-07-29 |
| 6169721 | Two-disc laminated optical recording medium | Shinichi Hanzawa, Shigenori Murakami, Atsushi Kondo, Ayumi Mitsumori, Miki Kusama +1 more | 2001-01-02 |
| 5926453 | Optical disk having first and second recording areas with wobble frequencies that do not interfere with EFM signal | Eiji Muramatsu, Akiyoshi Inoue, Shoji Taniguchi, Hiroyuki Takahashi, Shigenori Murakami | 1999-07-20 |
| 5592463 | Apparatus for and method for determining optimum power for recording information on recordable optical disc | Eiji Muramatsu, Akiyoshi Inoue, Shoji Taniguchi, Hiroyuki Takahashi, Shigenori Murakami | 1997-01-07 |
| 5426632 | Information recording medium and method for recording information to the same | Shigenori Murakami, Kenji Suzuki, Kiyohide Ogasawara, Hiroshi Ito | 1995-06-20 |
| 4947384 | Optical disk having narrow and wide guide grooves | Kenji Suzuki, Satoru Fukuoka, Hirokazu Hashikawa, Tsuyoshi Hayashi, Minemasa Ohta | 1990-08-07 |
| 4837130 | Optical disk manufacturing method | Minemasa Ohta, Kenji Suzuki, Satoru Fukuoka, Tuyoshi Hayashi | 1989-06-06 |