Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7667975 | Lighting device of discharge lamp, illumination apparatus and illumination system | Yasushi Kambara, Masayuki Nakajima | 2010-02-23 |
| 4935912 | Circuit for digitally generating a tracking error signal to avoid offset monitoring | Hiroyuki Hirano | 1990-06-19 |
| 4860271 | Servo circuit for generating a tracking error signal for optical disk player | Fumihiko Yokogawa, Hiroyuki Hirano | 1989-08-22 |
| 4737696 | Actuator drive circuit | Fumihiko Yokogawa | 1988-04-12 |
| 4558213 | Pickup level control device for a system for reading out recorded information | Koki Aizawa, Yoshiyuki Takizawa, Akira Haeno | 1985-12-10 |