Issued Patents All Time
Showing 1–25 of 28 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7193947 | Optical information recording method, optical information recording device and optical information recording medium | Kenji Narumi, Kenichi Nishiuchi, Noboru Yamada | 2007-03-20 |
| 6967911 | Multivalued information recording method, multivalued information recording apparatus, and recording medium | Hiromichi Ishibashi, Kenichi Nishiuchi | 2005-11-22 |
| RE36383 | Optical recording medium and production process for the medium | Kazumi Yoshioka, Masami Uchida, Katsumi Kawahara, Shigeaki Furukawa | 1999-11-09 |
| 5753334 | Optical recording medium | Kazumi Yoshioka, Shigeaki Furukawa, Katsumi Kawahara | 1998-05-19 |
| 5681632 | Optical information recording medium | Hideki Kitaura, Tetsuya Akiyama, Ken'ichi Nagata, Katsumi Kawahara, Noboru Yamada | 1997-10-28 |
| 5674649 | Method of recording information | Kazumi Yoshioka, Tetsuya Akiyama, Hidemi Isomura | 1997-10-07 |
| 5665520 | Optical recording medium | Kazumi Yoshioka, Tetsuya Akiyama, Hidemi Isomura | 1997-09-09 |
| 5610879 | Optical reproducing device, optical reproducing method using the same, and optical record medium used in the same | Mitsurou Moriya, Hiromichi Ishibashi, Yasuhiro Sugihara | 1997-03-11 |
| 5587216 | Optical recording medium | Kazumi Yoshioka, Shigeaki Furukawa, Katsumi Kawahara | 1996-12-24 |
| 5439752 | Optical recording medium and reflecting film for use therein | Kazumi Yoshioka, Masami Uchida, Shigeaki Furukawa | 1995-08-08 |
| 5395669 | Optical record medium | Katsumi Kawahara, Shigeaki Furukawa, Tetsuya Akiyama | 1995-03-07 |
| 5256518 | Information storage disk employing a reflective layer having good malleability | Tetsuya Akiyama, Hidemi Isomura, Shigeaki Furukawa | 1993-10-26 |
| 5230973 | Method of recording and erasing information in an erasible optical recording medium | Kazumi Yoshioka, Masami Uchida, Katsumi Kawahara, Shigeaki Furukawa | 1993-07-27 |
| 5194363 | Optical recording medium and production process for the medium | Kazumi Yoshioka, Masami Uchida, Katsumi Kawahara, Shigeaki Furukawa | 1993-03-16 |
| 5191565 | Optical information recording medium | Kazuo Inoue, Masami Uchida, Kazumi Yoshioka, Shigeaki Furukawa | 1993-03-02 |
| 5151295 | Process for manufacturing an optical recording medium | Katsumi Kawahara, Masami Uchida, Kazumi Yoshioka, Keiichiro Horai | 1992-09-29 |
| 5147701 | Information recording medium | Shigeaki Furukawa, Tetsuya Akiyama, Hidemi Isomura | 1992-09-15 |
| 5024910 | Optical information recording medium | Masami Uchida, Koichi Kotera, Kunihiro Matsubara | 1991-06-18 |
| 4852076 | Optical information recording and reproducing disc employing a film having thermally changeable optical characteristics | Tatsushi Nakamura, Shizuhiko Tanigawa | 1989-07-25 |
| 4770923 | Protection film structure for functional devices | Kiyotaka Wasa, Takashi Hirao, Atsuo Nishikawa, Seiji Nishino | 1988-09-13 |
| 4621794 | Apparatus for producing a grain-oriented electromagnetic steel strip or sheet | Katsuaki Kokai | 1986-11-11 |
| 4547875 | Optical recording and retrieving disc | Tatsushi Nakamura, Nobuo Akahira | 1985-10-15 |
| 4500366 | Process for producing a grain-oriented electromagnetic steel strip or sheet | Katsuaki Kokai | 1985-02-19 |
| 4457794 | Method for manufacturing optical memory disc | Koichi Kotera | 1984-07-03 |
| 4403318 | Apparatus and method for recording, reproducing and erasing on optical recording discs | Michiyoshi Nagashima, Tomio Yoshida | 1983-09-06 |