Issued Patents All Time
Showing 1–2 of 2 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, Toshihiko Okina, Satoru Kishita | 2003-02-18 |
| 5745470 | Head moving apparatus which cancels leakage flux | Koichi Nagai | 1998-04-28 |