Issued Patents All Time
Showing 1–15 of 15 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6804183 | Rotation control method for controlling rotation of media having zones in radial direction and employing ZCAV system, and storage apparatus using the rotation control method | Toru Ikeda, Shigenori Yanagi | 2004-10-12 |
| 6030716 | Magneto-optical recording medium and method of reproducing information recorded on such medium | Haruhiko Izumi, Ken Tamanoi, Masaharu Moritsugu, Toshio Sugimoto, Koji Matsumoto +1 more | 2000-02-29 |
| 5796712 | Optical disk having identification signal recorded between and used in common for two mutually adjacent tracks and optical disk unit therefor | Mineo Moribe, Susumu Satoh, Kyoko Miyabe | 1998-08-18 |
| 5768245 | Optical disk apparatus | Yoshiyuki Nanba, Takehiko Numata | 1998-06-16 |
| 5691072 | Magneto-optical recording medium and method of reproducing information recorded on such medium | Haruhiko Izumi, Ken Tamanoi, Masaharu Moritsugu, Toshio Sugimoto, Koji Matsumoto +1 more | 1997-11-25 |
| 5402411 | Constant amplitude of tracking error signals generated from a head guide track and a performed track | Mineo Moribe, Susumu Satoh, Kyoko Miyabe | 1995-03-28 |
| 5381396 | Magneto-optical recording method and apparatus for recording information on a magneto-optical recording media | Tsutomu Tanaka, Keiji Shono, Yoshiyuki Namba, Koji Matsumoto | 1995-01-10 |
| 5353265 | Magneto optical overwriting methods using a single optical head designed for a two-beam overwrite | Yuji Inouye, Yasunobu Hashimoto, Ken-ichi Itoh, Seiya Ogawa | 1994-10-04 |
| 5337303 | Disk storage device having light receiving device located at improved position | — | 1994-08-09 |
| 5214627 | Optical disk having read-exclusive and write-enable regions | Kazuo Nakashima, Yasunobu Hashimoto, Seiya Ogawa | 1993-05-25 |
| 5144601 | Magneto-optical overwriting methods using erasing pulses, each of which has a higher frequency and narrower width than that of the overwriting pulses | Yuji Inouye, Yasunobu Hashimoto, Ken-ichi Itoh, Seiya Ogawa | 1992-09-01 |
| 5138572 | Optical information memory medium including indium (In) and bismuth (Bi) | Nagaaki Koshino, Yasuyuki Goto, Itaru Shibata, Kenichi Utsumi, Akira Ushioda +2 more | 1992-08-11 |
| 5072423 | Optical information memory medium recording and erasing information including gallium and antimony | Nagaaki Koshino, Yasuyuki Goto, Itaru Shibata, Kenichi Utsumi, Akira Ushioda +2 more | 1991-12-10 |
| 5058061 | Method for recording information in an optical information memory medium including indium (In) and Antimony (Sb) | Nagaaki Koshino, Yasuyuki Goto, Itaru Shibata, Kenichi Utsumi, Akira Ushioda +2 more | 1991-10-15 |
| 4947372 | Optical information memory medium for recording and erasing information | Nagaaki Koshino, Yasuyuki Goto, Itaru Shibata, Kenichi Utsumi, Akira Ushioda +2 more | 1990-08-07 |