Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4870428 | Driving method for thermal head and thermal printer utilizing the same | Nobuyuki Kuwabara, Ko Hasegawa, Yuichi Watanabe | 1989-09-26 |
| 4855758 | Thermal transfer recording apparatus with electroconductive ink | Nobuyuki Kuwabara, Kou Hasegawa, Hideo Sugimura, Kazuhiro Nakajima | 1989-08-08 |
| 4809063 | Multicolor printing method using rectangular dither matrices of different size, shape, and arrangement of threshold values to minimize overlap of differently colored inks at lower gradations | Inui Toshiharu | 1989-02-28 |