Issued Patents All Time
Showing 26–50 of 51 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5111443 | Optical recording apparatus | — | 1992-05-05 |
| 5103441 | Duty factor control circuit with variable output pulse width function | — | 1992-04-07 |
| 5089900 | Spindle control device in optical disk recording/reproducing apparatus | — | 1992-02-18 |
| 5065384 | Clock signal generating circuit for a data storing and reproducing system | — | 1991-11-12 |
| 5051836 | Optical disc with pregrooves and recording method and apparatus using an optical disc of that type | Yoshihiro Utsumi | 1991-09-24 |
| 5034938 | Optical disc recording and playing apparatus | — | 1991-07-23 |
| 4982110 | Clock generator circuit and a synchronizing signal detection method in a sampled format system and a phase comparator circuit suited for generation of the clock | Hiroyuki Hirano, Keiji Kinpara | 1991-01-01 |
| 4977553 | Method and apparatus for identifying the type of servo system to be used with a given disc | — | 1990-12-11 |
| 4974081 | Clock pulse generating circuit | — | 1990-11-27 |
| 4937809 | Optical information recording apparatus | Toshiyuki Miyadera, Shuichi Yanagisawa | 1990-06-26 |
| 4933922 | Apparatus for generating a tracking error signal | — | 1990-06-12 |
| 4929917 | Phase-locked loop circuit | Ryuichi Naito | 1990-05-29 |
| 4908811 | Method and apparatus for data recording and reproducing with error reduction | Hiroyuki Hirano | 1990-03-13 |
| 4879705 | Automatic loading disc player | Yoshio Aoyagi, Hiroyuki Hirano, Toshiyuki Kimura, Susumu Niinuma, Minoru Yoshioka +6 more | 1989-11-07 |
| 4872155 | Clock generator circuit and a synchronizing signal detection method in a sampled format system and a phase comparator circuit suited for generation of the clock | Hiroyuki Hirano, Keiji Kinpara | 1989-10-03 |
| 4866691 | AC amplifying RF signal processing circuit for optical disk player | — | 1989-09-12 |
| 4860271 | Servo circuit for generating a tracking error signal for optical disk player | Hiroyuki Hirano, Akira Motoyama | 1989-08-22 |
| 4829502 | Automatic loading disc player | Yoshiro Aoyagi, Toshiyuki Kimura, Susumu Niinuma, Minoru Yoshioka, Keiichi Matsumoto +6 more | 1989-05-09 |
| 4787078 | Optical data recording and reproducing system with control of high frequency superposed signal applied to semiconductor laser | — | 1988-11-22 |
| 4737696 | Actuator drive circuit | Akira Motoyama | 1988-04-12 |
| 4701902 | Automatic loading disc player | Yoshiro Aoyagi, Toshiyuki Kimura, Susumu Niinuma, Minoru Yoshioka, Keiichi Matsumoto +6 more | 1987-10-20 |
| 4637003 | Amplitude modulated high frequency signal detection device | — | 1987-01-13 |
| 4540897 | Digital modulation signal reading device | Saburo Takaoka, Ryuichi Naito, Youichi Ogawa | 1985-09-10 |
| 4520282 | Electronic impedance circuit including a compensation arrangement for d.c. offset | Kazuo Watanabe, Yuichi Ohkubo, Akira Haeno | 1985-05-28 |
| 4513242 | Electronic impedance device for providing a variable impedance | — | 1985-04-23 |