Issued Patents 2004
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6728173 | Information reproducing method which reproduces plural components of a focus error signal and a tracking error signal from plural detection regions of plural reflected light beams | Takeshi Shimano, Shigeru Nakamura, Kunikazu Ohnishi, Masayuki Inoue | 2004-04-27 |
| 6721242 | Optical detector having three light receiving areas | Kunikazu Ohnishi, Takeshi Shimano, Shigeru Nakamura, Masayuki Inoue, Yasuyuki Sugi +2 more | 2004-04-13 |