Issued Patents 2004
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6747812 | Objective lens for optical pick-up apparatus and optical pick-up apparatus | Hidekazu Totsuka, Yuichi Atarashi | 2004-06-08 |
| 6728042 | Optical pick-up device and objective lens used therein | Norikazu Arai | 2004-04-27 |
| 6687209 | Optical pickup apparatus, objective lens, apparatus for reproducing and/or recording optical information recording medium | Norikazu Arai | 2004-02-03 |