Issued Patents All Time
Showing 26–38 of 38 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6831885 | Optical disk apparatus wherein recording clock signal is stopped being supplied to semiconductor laser drive circuit on optical pickup during reproduction operation | Akihiro Asada, Toshimitsu Kaku, Takashi Hoshino | 2004-12-14 |
| 6687208 | Laser drive integrated circuit and optical disk apparatus using the same | Akihiro Asada, Hideo Ohnuki, Yasuhito Tanaka, Toshimitsu Kaku, Takashi Hoshino +1 more | 2004-02-03 |
| 6674702 | Laser drive integrated circuit and optical disk apparatus using the same | Akihiro Asada, Hideo Ohnuki, Yasuhito Tanaka, Toshimitsu Kaku, Takashi Hoshino +1 more | 2004-01-06 |
| 6636472 | Laser drive unit and information recording/reproducing apparatus | Akihiro Asada, Toshimitsu Kaku, Hideo Oonuki, Takashi Hoshino, Hidehiko Kandou | 2003-10-21 |
| 6552987 | Optical disk apparatus wherein recording clock signal is stopped being supplied to semiconductor laser drive circuit on optical pickup during reproduction operation | Akihiro Asada, Toshimitsu Kaku, Takashi Hoshino | 2003-04-22 |
| 6487154 | Laser drive unit and information recording/reproducing apparatus | Akihiro Asada, Toshimitsu Kaku, Hideo Oonuki, Takashi Hoshino, Hidehiko Kandou | 2002-11-26 |
| 6483791 | Laser drive integrated circuit and optical disk apparatus using the same | Akihiro Asada, Hideo Ohnuki, Yasuhito Tanaka, Toshimitsu Kaku, Takashi Hoshino +1 more | 2002-11-19 |
| 6200673 | Magneto-optical recording medium | Harukazu Miyamoto, Toshio Niihara, Motoyasu Terao, Norio Ohta | 2001-03-13 |
| 6169714 | Apparatus and method for recording/reproducing magneto-optical information | Yasuhito Tanaka, Takeshi Maeda, Hitoshi Watanabe, Tetsu Watanabe, Shigemi Maeda +3 more | 2001-01-02 |
| 5642345 | Recording/reproducing apparatus including frequency modulator for frequency-modulating digital-modulated signal and frequency demodulator for frequency-demodulating signal to obtain digital-modulated signal | Nobuhiro Tokushuku, Makoto Miyamoto, Naomi Suzuki, Yoshihiko Noro | 1997-06-24 |
| 5541909 | Optical disc with phase pits and a reproducing apparatus for data recorded on the optical disc | Junji Nakajima, Kunikazu Ohnishi, Tooru Sasaki, Makoto Miyamoto, Yoshio Suzuki +4 more | 1996-07-30 |
| 5539710 | Video optical disk system compatible with both read only and writable optical disks having the same recording format | Nobuhiro Tokushuku, Kouichi Moritani, Hitoshi Yanagihara, Katsuo Konishi, Katsuyuki Tanaka +2 more | 1996-07-23 |
| 4799118 | Thin film magnetic head | Masamichi Yamada, Masakatsu Saito, Hitoshi Yanagihara, Katsuo Konishi, Toshio Tsuchiya | 1989-01-17 |