Issued Patents All Time
Showing 51–69 of 69 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5268883 | Track access device and tracking control device | Hiroyuki Yamaguchi | 1993-12-07 |
| 5257250 | Tracking-control target-position adjustment method | Masayuki Shibano, Hiroyuki Yamaguchi, Shinichi Yamada, Katsuya Watanabe | 1993-10-26 |
| 5253239 | Control apparatus for tracking a light beam on a track of an optical recording medium | Yasuaki Edahiro, Katsuya Watanabe | 1993-10-12 |
| 5228020 | System for detecting rotational deviation of a rotary recording medium and an apparatus for reproducing a signal from the recording medium | Kazuharu Shiragami, Hiroyuki Yamaguchi | 1993-07-13 |
| 5202864 | Slip-off preventing tracking control apparatus | Hiroyuki Yamaguchi, Masayoshi Shioya | 1993-04-13 |
| 5191566 | Velocity detection method and apparatus therefor | Hiroyuki Yamaguchi, Shinichi Yamada, Masayuki Shibano | 1993-03-02 |
| 5177719 | Data track accessing apparatus | Shinichi Yamada, Hiroyuki Yamaguchi | 1993-01-05 |
| 5146440 | Track search apparatus | Hiroyuki Yamaguchi, Shin Yamada | 1992-09-08 |
| 5140576 | Method of and apparatus for setting focusing control into operation | Shinichi Yamada, Masayuki Shibano, Hiroyuki Yamaguchi | 1992-08-18 |
| 5140580 | Optical disk apparatus operative with optimal recording power setting | Shunji Ohara, Yoshihisa Fukushima, Kenzo Ishibashi | 1992-08-18 |
| 5109366 | Slip-off preventing tracking control apparatus | Hiroyuki Yamaguchi, Masayoshi Shioya | 1992-04-28 |
| 5090003 | Method and apparatus for adjusting target position of focusing of light beam | Katsuya Watanabe, Shinichi Yamada, Masayuki Shibano | 1992-02-18 |
| 5048001 | Load correction method for an information retrieval apparatus | Masayuki Shibano, Hiroyuki Yamaguchi, Shinichi Yamada, Katsuya Watanabe | 1991-09-10 |
| 4951273 | Optical recording and reproducing device with normalization of servo control signal using switchable automatic gain control circuitry | Toshifumi Yoshida, Mitsuo Nabae, Yasuo Nishinaka | 1990-08-21 |
| 4807206 | Track jump detection system | Toshiji Kanamaru, Kazuharu Shiragami, Hiroyuki Yamaguchi, Katsuya Watanabe | 1989-02-21 |
| 4692915 | Recording and reproduction apparatus having improved reliability with respect to externally applied vibration or impact | Kazuharu Shiragami, Hiroyuki Yamaguchi | 1987-09-08 |
| 4562562 | Tracking system for controlling the radial positioning of a transducer on a disc medium | Toshiji Kanamaru, Yoshinobu Nakata | 1985-12-31 |
| 4544957 | Time base correction apparatus | Makoto Ichinose | 1985-10-01 |
| 4539664 | Control system for optical information signal reproduction device | Masahiro Deguchi, Noboru Wakami, Yasuhiro Goto, Kazuharu Shiragami | 1985-09-03 |