Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4871653 | Process for forming direct-positive image | Noriyuki Inoue, Tatsuo Heki | 1989-10-03 |
| 4859579 | Silver halide photographic material | Shigeo Hirano, Mitsuru Yamamoto, Noriyuki Inoue, Tatsuo Heki | 1989-08-22 |