Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4863845 | Internal latent image type direct positive silver halide emulsions and process for producing the same | Hiroyuki Mifune, Tatsuo Heki | 1989-09-05 |
| 4828973 | Silver halide photographic material with heterocyclic quaternary ammonium nucleating agent | Shigeo Hirano, Seiji Suzuki | 1989-05-09 |
| 4823155 | Instant camera with spring-urged pressure plate | Hideaki Kataoka, Akira Haishi | 1989-04-18 |