Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6847590 | Magneto-optical recording medium including a calibration magnetic domain recorded in a predetermined pattern in a recording layer | Atsushi Yamaguchi, Naoyuki Takagi, Satoshi Sumi, Hiroyuki Awano, Hiroshi Shirai +2 more | 2005-01-25 |
| 6621772 | Record medium and reproducing apparatus of the same for detecting an offset correction | Kenji Asano, Noboru Mamiya, Satoshi Sumi, Kenji Nakao, Hiroshi Watanabe +8 more | 2003-09-16 |
| 6400653 | Information recording/reproducing apparatus to record/reproduce information on a recording medium recorded with an address mark | Kenji Torazawa, Kenji Asano, Satoshi Sumi, Noboru Mamiya, Toshiaki Hioki | 2002-06-04 |
| 6324138 | Digital disk recording and reproduction apparatus | Yoshihiro Hori, Hisashi Matsuyama, Akiomi Kunisa, Nobuo Itoh, Seiichiro Takahashi +6 more | 2001-11-27 |
| 6301199 | Magneto-optical recording medium and recording/reproducing apparatus therefor in which recorded magnetic domains are transferred from the recording layer to the reproducing layer | Atsushi Yamaguchi, Naoyuki Takagi, Satoshi Sumi, Hiroyuki Awano, Hiroshi Shirai +2 more | 2001-10-09 |
| 6243326 | Recording and reproduction device for a magneto-optic recording medium capable of recording information according to optical super-resolution | Satoshi Sumi, Yoshihisa Suzuki, Atsushi Yamaguchi, Kenji Tanase, Kenji Torazawa +1 more | 2001-06-05 |
| 6198710 | Digital recording method, digital disk, digital disk recording device, and digital disk reproducing device | Yoshihiro Hori, Hisashi Matsuyama, Akiomi Kunisa, Nobuo Itoh, Seiichiro Takahashi +6 more | 2001-03-06 |
| 5968678 | Magneto-optical recording medium and manufacturing method thereof | Kenji Tanase, Atsushi Yamaguchi, Yoshihisa Suzuki, Satoshi Sumi, Seiji Murata +1 more | 1999-10-19 |
| 4957776 | Method of manufacturing optical disc | Masahiro Higuchi, Sadao SAKAMOTO | 1990-09-18 |