Issued Patents 2003
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6671247 | Optical pick-up apparatus, optical element, and objective lens having diffracting section | Norikazu Arai, Toshiyuki Kojima | 2003-12-30 |
| 6512640 | Objective lens for pickup and light pickup apparatus | Tohru Kimura | 2003-01-28 |