Issued Patents 2004
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6825995 | Optical device, optical system, method of production of same, and mold for production of same | Masahiro Yamada, Akira Kouchiyama | 2004-11-30 |
| 6785222 | Read-only optical recording medium and disc cartridge | Naohiro Netsu, Yoshitaka Aoki, Kazuhiko Fujiie, Yasuaki Maeda, Takuya Kaeriyama | 2004-08-31 |
| 6747943 | Optical recording medium and disc cartridge | Naohiro Netsu, Yoshitaka Aoki, Kazuhiko Fujiie, Yasuaki Maeda, Takuya Kaeriyama | 2004-06-08 |
| 6717738 | Optical element, metal mold for producing optical element and production method for optical element | Masahiro Yamada | 2004-04-06 |
| 6704275 | Optical recording medium and disc cartridge having 2 GB capacity | Naohiro Netsu, Yoshitaka Aoki, Kazuhiko Fujiie, Yasuaki Maeda, Takuya Kaeriyama | 2004-03-09 |