Issued Patents 1982
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4358528 | Formation of black-and-white silver-containing negative images by a diffusion transfer process | Katsumi Hayashi | 1982-11-09 |
| 4309499 | Formation of black-and-white silver-containing negative images by a diffusion transfer process | Katsumi Hayashi | 1982-01-05 |