Issued Patents 1997
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5700296 | Azo compound and a polarizing film containing the same | Kaneo Yokoyama, Narutoshi Hayashi, Takashi Omura, Setsuko Yamamoto | 1997-12-23 |
| 5659020 | Tetrakisazo compound and a polarizing film containing the same | Kaneo Yokoyama, Narutoshi Hayashi, Takashi Omura | 1997-08-19 |
| 5609796 | Dye containing polarizing film | Setsuko Yamamoto, Narutohsi Hayashi, Takashi Omura | 1997-03-11 |