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, Ryu Oi, Keisuke Takuma, Hisato Itoh | 1997-12-16 |
| 5659039 | Quinophthalone compounds | Akira Ogiso, Tsutami Misawa, Ryu Oi, Yoriaki Matsuzaki, Hisato Itoh | 1997-08-19 |
| 5639809 | Azo compounds and polarizing films using the compounds | Yoriaki Matsuzaki, Ryu Oi, Keisuke Takuma, Hisato Itoh | 1997-06-17 |
| 5618868 | Polarizing film of a hydrophilic polymer film containing a novel azo compound | Tsutami Misawa, Akira Ogiso, Hisato Itoh | 1997-04-08 |