Issued Patents All Time
Showing 1–14 of 14 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6980496 | Information recording/reproducing apparatus | Ryo Sato, Ko Ishii | 2005-12-27 |
| 6894955 | Quick access information read and write devices | Yoshitaka Shimoda, Masayoshi Yoshida, Tsuyoshi Hasebe, Motoji Nakamura | 2005-05-17 |
| 6346695 | Optical pickup device | Naoharu Yanagawa, Takahiro Togashi | 2002-02-12 |
| 6339581 | Disc player having a prepit detecting circuit | Masayoshi Yoshida, Yoshitaka Shimoda, Naoharu Yanagawa | 2002-01-15 |
| 6317400 | Optical pickup apparatus | Naoharu Yanagawa | 2001-11-13 |
| 6282067 | Magnetic reproducing head having a magnetoresistive effect | Kenji Machida, Naoto Hayashi, Yoshiro Yoneda, Junji Numazawa, Makiko Kohro +1 more | 2001-08-28 |
| 6072651 | Information recording/reproducing apparatus for reproducing information without requiring tracking servo | Masahiro Kato, Makiko Fujii | 2000-06-06 |
| 5708636 | Tracking error signal generation device | Hiroyuki Takahashi, Fumikazu Tahata, Hidehiro Ishii, Eiji Muramatsu, Akiyoshi Inoue | 1998-01-13 |
| 5339302 | RF signal-compensated system for reading an optical disc player with an absolute time detector | Hiroyuki Takahashi | 1994-08-16 |
| 5172355 | Photo-detecting device including offset correction | Naoharu Yanagawa, Takaaki Matsumoto | 1992-12-15 |
| 5150342 | Photo-detecting device | Naoharu Yanagawa, Takaaki Matsumoto | 1992-09-22 |
| 5136567 | Photo-detecting device | Naoharu Yanagawa, Takaaki Matsumoto | 1992-08-04 |
| 5003411 | Method for recording/reproducing and searching digital signals using a helical scan type rotary head | Tomoyuki Suzuki, Tomoyasu Yamada, Tokihiro Takahashi, Ichiro Miyake | 1991-03-26 |
| 4930031 | Apparatus for recording and reproducing digital signals using a helical scan | Tomoyuki Suzuki, Tomoyasu Yamada, Tokihiro Takahashi, Ichiro Miyake | 1990-05-29 |