Issued Patents All Time
Showing 26–31 of 31 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6296915 | Optical recording medium | Keiichiro Yusu, Akira Kikitsu, Toshihiko Nagase, Katsutaro Ichihara, Naomasa Nakamura +2 more | 2001-10-02 |
| 6240060 | Phase change optical recording medium | Akira Kikitsu, Keiichiro Yusu, Katsutaro Ichihara | 2001-05-29 |
| 5412627 | A magneto-optical recording system including a recording medium having a reversal preventive layer for preventing a magnetization reversal of a bias layer which is magnetostatically coupled to a recording layer | Katsutaro Ichihara, Akira Kikitsu, Yumi Mizusawa | 1995-05-02 |
| 5175714 | Method of magneto-optically recording/erasing information and magneto-optical information storage medium including recording and bias layers satisfying certain conditions | Akira Kikitsu, Katsutarou Ichihara | 1992-12-29 |
| 5105400 | Method of magneto-optically recording and erasing information onto a magneto-optical information storage medium | Akira Kikitsu, Katsutarou Ichihara | 1992-04-14 |
| 4839861 | Information recording medium rewritable by utilizing two metastable phases of a recording layer and method using the same | Sumio Ikegawa, Shuichi Komatsu, Shinji Arai, Nobuaki Yasuda | 1989-06-13 |