Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5659039 | Quinophthalone compounds | Rihoko Imai, Tsutami Misawa, Ryu Oi, Yoriaki Matsuzaki, Hisato Itoh | 1997-08-19 |
| 5618868 | Polarizing film of a hydrophilic polymer film containing a novel azo compound | Tsutami Misawa, Rihoko Imai, Hisato Itoh | 1997-04-08 |