Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5693396 | Phthalocyanine compounds and optical recording media comprising them | Tsutami Misawa, Kenichi Sugimoto, Takeshi Tsuda, Keisuke Takuma | 1997-12-02 |
| 5672462 | Optical recording medium | Keisuke Takuma, Tsutami Misawa, Kenichi Sugimoto, Takeshi Tsuda, Hideki Umehara | 1997-09-30 |