Issued Patents 2003
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6584061 | Optical pick-up device | Katsushige Yanagisawa, Tohru Hotta, Ikuo Kasuga | 2003-06-24 |
| 6522619 | Optical pick-up device having a plurality of light sources with different calorific values and method of manufacturing the same | Katsushige Yanagisawa, Tohru Hotta, Ikuo Kasuga, Toshihiko Okina, Hidenori Sai | 2003-02-18 |