Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| RE37719 | Optical data recording system and method of production of recording medium | Toshinori Sugiyama, Tetsurou Ikegaki, Mitsuru Shimizu | 2002-05-28 |
| 5021276 | Optical data recording medium and manufacturing method thereof | Hisamitsu Kamezaki, Masashi Suenaga, Osamu Saito, Shin-ichiro Iuchi, Hitoshi Watanabe +1 more | 1991-06-04 |
| 5013594 | Optical information recording medium and its production | Tetsuo Mizumura, Minoru Ichijo, Ken Nakao, Seiichi Matsushima | 1991-05-07 |
| 4985289 | Optical data recording medium | Hisamitsu Kamezaki | 1991-01-15 |
| 4911968 | Optical disc | Tosio Higasihara, Ken Yoshizawa, Masahiro Suzuki, Akira Gotoh | 1990-03-27 |
| 4876133 | Optical data recording system and method of production of recording medium | Toshinori Sugiyama, Tetsurou Ikegaki, Mitsuru Shimizu | 1989-10-24 |