Issued Patents 2005
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6909681 | Optical disk and optical disk apparatus | Masayoshi Nagata, Ikuhiro Hideta | 2005-06-21 |
| 6906990 | Phase-change optical disk and optical disk apparatus | Masayoshi Nagata, Takayoshi Chiba, Shigeo Yamaguchi, Junichi Horigome | 2005-06-14 |