Issued Patents 1997
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5698682 | Azo compounds and polarizing films using the compounds | Yoriaki Matsuzaki, Rihoko Imai, Keisuke Takuma, Hisato Itoh | 1997-12-16 |
| 5659039 | Quinophthalone compounds | Akira Ogiso, Rihoko Imai, Tsutami Misawa, Yoriaki Matsuzaki, Hisato Itoh | 1997-08-19 |
| 5646273 | Phthalocyanine compound and optical recording medium containing it | Takahisa Oguchi, Hideki Umehara, Kenichi Sugimoto, Hisato Itoh | 1997-07-08 |
| 5639809 | Azo compounds and polarizing films using the compounds | Yoriaki Matsuzaki, Rihoko Imai, Keisuke Takuma, Hisato Itoh | 1997-06-17 |