Issued Patents 2002
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6400664 | Optical head including electrical circuit which produces focus error signal and tracking error signal unaffected by variations in intensity distributions of reflected light beams | Takeshi Shimano, Shigeru Nakamura, Masayuki Inoue, Yukio Fukui | 2002-06-04 |