Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4322493 | Reversal processing methods for black and white photographic light-sensitive materials | Katsumi Hayashi | 1982-03-30 |
| 4272613 | Color photographic process | Junkichi Ogawa | 1981-06-09 |