Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8270265 | Optical pickup device and optical disk device | Hideki Yoshinaka, Masaharu Fukakusa, Mayumi Tsukamoto, Satoshi Nagata | 2012-09-18 |
| 7889620 | Optical pickup device and optical disk device | Masaharu Fukakusa, Hideki Yoshinaka, Mayumi Tsukamoto, Satoshi Nagata | 2011-02-15 |
| 7738347 | Optical pickup device and optical disk drive | Mayumi Tsukamoto, Masaharu Fukakusa, Hiroshi Sato | 2010-06-15 |
| 7729227 | Diffractive element, method of manufacturing the same, optical pickup device, and optical disc apparatus | Takatoshi Minoda, Noriaki Seki | 2010-06-01 |