Issued Patents 1989
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4835566 | Electrophotographic copying apparatus | Naoki Toyoshi, Tomoaki Yokoyama | 1989-05-30 |
| 4835569 | Electrophotographic copying machine for producing positive prints from both positive and negative originals | — | 1989-05-30 |
| 4828953 | Method for the formation of outline images corresponding to the peripheral outlines of document's images | Naoki Toyoshi, Tomoaki Yokoyama | 1989-05-09 |
| 4821071 | Electrophotographic copiers | Naoki Toyoshi, Hisashi Myochin, Tomoaki Yokoyama | 1989-04-11 |