Issued Patents 1997
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 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 |