Issued Patents 2003
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 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, Satoru Kishita, Hidenori Sai | 2003-02-18 |