Issued Patents 1989
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4875092 | Image forming apparatus with positioning-mark forming function | Eiichi Yamanishi, Yasuo Abuyama | 1989-10-17 |
| 4849793 | Image reading apparatus | — | 1989-07-18 |
| 4845549 | Apparatus for selectively producing a positive multi-color print and negative color separation films or positive and negative color separation films using a multi-color thermal transfer ink ribbon | — | 1989-07-04 |
| 4831462 | Image forming apparatus with halftone control function | Yasuo Abuyama | 1989-05-16 |