Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4859564 | Color diffusion transfer photographic element with reducing sugar | — | 1989-08-22 |
| 4833063 | Color diffusion transfer element comprising two neutralizing layers and two timing layers | Ikutaro Horie, Masaki Satake | 1989-05-23 |
| 4798779 | Process for forming an image by silver salt diffusion transfer | Yoshio Idota, Yukio Karino, Hiroshi Hayashi | 1989-01-17 |