Issued Patents All Time
Showing 76–91 of 91 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6246640 | Magneto-optical recording medium capable of recording multiple value signals | Katsusuke Shimazaki, Masafumi Yoshihiro, Akito Sakemoto, Norio Ohta, Osamu Ishizaki +2 more | 2001-06-12 |
| 6160769 | Optical recording medium and optical recording device | Satoru Ohnuki, Masafumi Yoshihiro, Tsuyoshi Maro | 2000-12-12 |
| 6101153 | Magnetic head capable of generating multi-stepped external magnetic fields for magneto-optical recording device | Katsusuke Shimazaki, Masafumi Yoshihiro, Akito Sakemoto, Norio Ohta, Osamu Ishizaki +2 more | 2000-08-08 |
| 6061307 | Magneto-optical recording medium having a plurality of magnetic layers | Katsusuke Shimazaki, Masafumi Yoshihiro, Akito Sakemoto, Norio Ohta, Osamu Ishizaki +2 more | 2000-05-09 |
| 6054199 | Optical recording medium | Masashi Suenaga, Hitoshi Watanabe, Shinitsu Kinoshita, Hirofumi Sukeda, Hisataka Sugiyama | 2000-04-25 |
| 6044041 | Recording and reproducing apparatus having a magneto-optical head with an objective lens and laser-beam-permeable member | Osamu Ishizaki, Katsusuke Shimazaki, Masafumi Yoshihiro, Susumu Imai | 2000-03-28 |
| 5799576 | Rotary stamp | Hiroyuki Koike | 1998-09-01 |
| 5757492 | Apparatus for measuring the flying height of magnetic heads using a single-crystal sapphire disc | Teruaki Tokutomi, Kyoichi Mori | 1998-05-26 |
| 5598400 | Disc cartridge having an opening/closing slider mechanism | Yoshito Tanaka | 1997-01-28 |
| 5495467 | Disc cartridge having an opening/closing slider mechanism | Yoshito Tanaka, Yoshitane Tsuburaya | 1996-02-27 |
| 5408452 | Optical information recording/reproducing system including novel tracking system | Akito Sakemoto, Zenji Tsutsumi, Shigeru Nakamura, Masahiro Ojima | 1995-04-18 |
| 5166844 | Disc drive apparatus having a mechanism for opening/closing the shutter of a disc cartridge | Yoshito Tanaka, Yoshitane Tsuburaya | 1992-11-24 |
| 4876133 | Optical data recording system and method of production of recording medium | Tetsurou Ikegaki, Mitsuru Shimizu, Yoshitane Tuburaya | 1989-10-24 |
| 4733388 | Information recording disc | Nobuyuki Fujimoto, Shinichi Abe, Yoshito Tsunoda, Kazuo Shigematsu, Yasunori Kanazawa +1 more | 1988-03-22 |
| 4720826 | Ventilation arrangement for use in an optical recording disc | Mitsuru Shimizu | 1988-01-19 |
| 4710913 | Optical recording disc | Seiichi Matsushima, Toshio Higashihara, Mitsuru Shimizu, Ken Yoshizawa, Masahiro Suzuki | 1987-12-01 |