Issued Patents 2002
Showing 1–4 of 4 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, Kunikazu Ohnishi, Masayuki Inoue | 2002-06-04 |
| 6388976 | Compact optical head including two light emitters having parallel optical axes | Shinji Fujita, Hidenori Shinohara, Toshio Sugiyama, Nobuo Imada | 2002-05-14 |
| 6383595 | Information recording medium | Akemi Hirotsune, Motoyasu Terao, Makoto Miyamoto, Yasushi Miyauchi, Tetsuya Nishida +5 more | 2002-05-07 |
| 6340555 | Information recording medium and information recording and reproducing apparatus using the same | Makoto Miyamoto, Motoyasu Terao, Nobuhiro Tokushuku, Keikichi Andoo, Tetsuya Nishida +3 more | 2002-01-22 |