Issued Patents 1994
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5372911 | Process of forming super high-contrast negative images and silver halide photographic material and developer being used therefor | Naoki Obi, Yasuhiko Kojima, Yasuo Shigemitsu, Kiyoshi Suematsu | 1994-12-13 |