Issued Patents All Time
Showing 26–37 of 37 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5636187 | Magnetooptical recording apparatus and magnetooptical recording method for canceling leakage magnetic fields associated with a recording medium and devices ancillary to the recording medium | — | 1997-06-03 |
| 5525378 | Method for producing a magnetooptical recording medium | Yoichi Osato, Hisaaki Kawade, Nobuhiro Kasama, Tadashi Kobayashi | 1996-06-11 |
| 5481410 | Magnetooptical recording medium allowing overwriting with two or more magnetic layers and recording method utilizing the same | Yoichi Osato, Hisaaki Kawade, Nobuhiro Kasama, Tadashi Kobayashi | 1996-01-02 |
| 5353266 | Magnetooptical recording method | — | 1994-10-04 |
| 5253233 | Method of making a magneto-optical recording medium that includes a light interference layer having specified characteristics | — | 1993-10-12 |
| 5132945 | Magnetooptical recording medium allowing overwriting with two or more magnetic layers and recording method utilizing the same | Yoichi Osato, Hisaaki Kawade, Nobuhiro Kasama, Tadashi Kobayashi | 1992-07-21 |
| 5093817 | Method and apparatus for recording information on an opto-magnetic recording medium by applying a modulated light beam while applying a magnetic field alternating with a constant period | Masaharu Tsukada, Takayuki Aizawa, Tohru Tatsuno, Yasuyuki Tamura, Norio Hashimoto | 1992-03-03 |
| 4999260 | Magneto-optical recording medium comprising a rare-earth-transition metal dispersed in a dielectric | Ichiro Saito, Yoichi Osato, Kozo Arao | 1991-03-12 |
| 4939023 | Opto-magnetic recording medium | Hiroshi Omata, Shigeharu Iijima, Eizou Sasamori, Katsuhiko Takano, Ichiro Saito +1 more | 1990-07-03 |
| 4937799 | Method and apparatus for setting light quantity most suitable for reproducing information from an optical recording medium | Norio Hashimoto | 1990-06-26 |
| 4675767 | Opto-magnetic recording medium | Yoichi Osato, Ichiro Saito, Kozo Arao, Yoshio Takasu | 1987-06-23 |
| 4664977 | Opto-magnetic recording medium | Yoichi Osato, Ichiro Saito, Kozo Arao | 1987-05-12 |