Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5700296 | Azo compound and a polarizing film containing the same | Kazuya Ogino, Kaneo Yokoyama, Takashi Omura, Setsuko Yamamoto | 1997-12-23 |
| 5659020 | Tetrakisazo compound and a polarizing film containing the same | Kazuya Ogino, Kaneo Yokoyama, Takashi Omura | 1997-08-19 |