Issued Patents All Time
Showing 26–31 of 31 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6385158 | Optical pickup device having compatibility with tracking system, and optical disk recording/reproduction apparatus using the same | Satoshi Sumi | 2002-05-07 |
| 6370093 | Optical disc device | Koichi Tada, Shinichi Ohe, Ken Hirose, Shuichi Ichiura, Hiroshi Watanabe | 2002-04-09 |
| 6348896 | Antenna device | Masahiro Ohara | 2002-02-19 |
| 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, Yoshiharu Uchihara, Satoshi Sumi, Hiroyuki Awano, Hiroshi Shirai +2 more | 2001-10-09 |
| 6295253 | Magnetooptical disk unit capable of recording or reproducing signals having different domain lengths under the same conditions, signal recording method and signal reproducing method | Kenichiro Mitani, Hitoshi Noguchi, Atsushi Yamaguchi, Hiroki Ishida | 2001-09-25 |
| 5440535 | Method of counting tracks on disk and track counter circuit therefor | Osamu Ota | 1995-08-08 |