Issued Patents 2003
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6656560 | Multi-layer optical recording medium and method of manufacturing the same | Kaoru Yamamoto, Keiji Suga, Noriyoshi Shida | 2003-12-02 |
| 6641887 | Optical recording medium | Takamasa Yoshikawa, Katsuhiro Koike | 2003-11-04 |