Issued Patents All Time
Showing 26–40 of 40 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6388954 | Magneto-optical recording medium having clock-marks on recording layer and apparatus for recording and reproducing same | Hiroyuki Awano, Hiroki Takao, Norio Ohta, Akiyoshi Itou, Katsuji Nakagawa +3 more | 2002-05-14 |
| 6385140 | Magneto-optical recording medium and reproducing method for reproducing magnetic domain in enlarged form on a reproducing layer | Satoru Ohnuki, Norio Ohta, Masafumi Yoshihiro, Hiroki Takao, Hitoshi Watanabe | 2002-05-07 |
| 6339583 | Cartridge for information-recording media having deformable elastic member on shutter | Hitoshi Watanabe, Yoshitane Tsuburaya, Satoru Ohnuki, Norio Ohta | 2002-01-15 |
| 6246640 | Magneto-optical recording medium capable of recording multiple value signals | Masafumi Yoshihiro, Akito Sakemoto, Norio Ohta, Osamu Ishizaki, Satoru Ohnuki +2 more | 2001-06-12 |
| 6226234 | Magneto-optic recording medium and reproducing method for reproducing magnetic domain in enlarged form on a reproducing layer | Satoru Ohnuki, Norio Ohta, Masafumi Yoshihiro, Hiroki Takao, Hitoshi Watanabe | 2001-05-01 |
| 6122228 | Magneto-optical recording medium and reproduction method therefor | Yoshitane Tsuburaya, Norio Ohta, Hitoshi Watanabe, Hiroki Takao | 2000-09-19 |
| 6101153 | Magnetic head capable of generating multi-stepped external magnetic fields for magneto-optical recording device | Masafumi Yoshihiro, Akito Sakemoto, Norio Ohta, Osamu Ishizaki, Satoru Ohnuki +2 more | 2000-08-08 |
| 6061307 | Magneto-optical recording medium having a plurality of magnetic layers | Masafumi Yoshihiro, Akito Sakemoto, Norio Ohta, Osamu Ishizaki, Satoru Ohnuki +2 more | 2000-05-09 |
| 6044041 | Recording and reproducing apparatus having a magneto-optical head with an objective lens and laser-beam-permeable member | Osamu Ishizaki, Toshinori Sugiyama, Masafumi Yoshihiro, Susumu Imai | 2000-03-28 |
| 5965286 | Magneto-optical recording medium | Satoru Ohnuki, Norio Ohta, Hideo Fujiwara, Masafumi Yoshihiro, Noriyuki Ogihara +1 more | 1999-10-12 |
| 5923625 | Magneto-optical recording medium and method for recording and reproduction thereon | Norio Ohta, Akiyoshi Ito, Katsuji Nakagawa, Kazuko Inoue | 1999-07-13 |
| 5783320 | Magneto-optical recording medium and process for producing the same | Satoru Ohnuki, Masatoshi Hashimoto, Yoshinori Shirai, Norio Ohta, Hideo Fujiwara +4 more | 1998-07-21 |
| 5639563 | Magneto-optical recording medium | Satoru Ohnuki, Norio Ohta, Hideo Fujiwara, Masafumi Yoshihiro, Noriyuki Ogihara +1 more | 1997-06-17 |
| 5637411 | Magneto-optical recording medium and process for producing the same | Satoru Ohnuki, Masatoshi Hashimoto, Yoshinori Shirai, Norio Ohta, Hideo Fujiwara +4 more | 1997-06-10 |
| 5590097 | Magnetooptic recording medium | Akira Kashiwakura, Masafumi Yoshihiro, Shin-Itsu Kinoshita, Norio Oota, Hisanori Sugiyama | 1996-12-31 |