Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4839273 | Process for the development of silver halide photographic material | Minoru Yamada, Kunio Seto | 1989-06-13 |
| 4810622 | Method for processing silver halide photographic material with an alkaline black and white developer | Minoru Yamada | 1989-03-07 |