Issued Patents 1997
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5693396 | Phthalocyanine compounds and optical recording media comprising them | Kenichi Sugimoto, Taizo Nishimoto, Takeshi Tsuda, Keisuke Takuma | 1997-12-02 |
| 5672462 | Optical recording medium | Keisuke Takuma, Kenichi Sugimoto, Taizo Nishimoto, Takeshi Tsuda, Hideki Umehara | 1997-09-30 |
| 5658707 | Optical recording media | Keisuke Takuma, Masatoshi Yanagimachi, Hideki Umehara, Yoshiteru Taniguchi, Sumio Hirose | 1997-08-19 |
| 5659039 | Quinophthalone compounds | Akira Ogiso, Rihoko Imai, Ryu Oi, Yoriaki Matsuzaki, Hisato Itoh | 1997-08-19 |
| 5618868 | Polarizing film of a hydrophilic polymer film containing a novel azo compound | Akira Ogiso, Rihoko Imai, Hisato Itoh | 1997-04-08 |