Issued Patents All Time
Showing 51–52 of 52 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4234671 | Color diffusion transfer dye mordant | Hideaki Iwama, Masao Asano, Yasuo Tsuda | 1980-11-18 |
| 4193800 | Photographic dye mordant | Hideaki Iwama, Yasuo Tsuda, Masao Asano | 1980-03-18 |