Issued Patents 2004
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6778475 | Optical detector, optical pickup and optical information reproducing apparatus using optical pickup for detecting at least three light beams separated from one or more light sources | Katsuhiko Izumi, Kunikazu Ohnishi, Kenichi Shimada, Masayuki Inoue | 2004-08-17 |
| 6721242 | Optical detector having three light receiving areas | Kunikazu Ohnishi, Takeshi Shimano, Shigeru Nakamura, Masayuki Inoue, Yukio Fukui +2 more | 2004-04-13 |