Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4873172 | Process for forming a superhigh contrast negative image | Shoji Ishiguro, Shigeo Hirano, Akio Miyake | 1989-10-10 |
| 4822891 | 4-amino-2,3-di-substituted-1-(mono- or trichlorophenyl)-3-pyrazolin-5-ones | Yoshio Inagaki | 1989-04-18 |
| 4801524 | Process for preparing silver halide emulsion and photographic light-sensitive material containing said emulsion | Hiroyuki Mifune, Yoshiaki Suzuki | 1989-01-31 |