Issued Patents 1989
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4865939 | Process for preparation of heat-sensitive diazo microcapsule recording material using pressure applying apparatus | Toshiharu Tanaka, Takayuki Hayashi | 1989-09-12 |
| 4857501 | Manufacturing method of a heat sensitive recording material | Akihiro Shimomura, Sumitaka Tatsuta, Seiji Hatakeyama | 1989-08-15 |
| 4845071 | Heatsensitive recording material | Akihiro Shimomura, Seiji Hatakeyama | 1989-07-04 |
| 4842979 | Black color heat-sensitive diazo microcapsule recording material with benzoylacetic amide coupler | Sadao Ishige, Hiroshi Kamikawa, Toshiharu Tanaka | 1989-06-27 |
| 4840933 | Heat sensitive recording material | Seiji Hatakeyama, Akihiro Shimomura | 1989-06-20 |
| 4820682 | Heat sensitive recording materials | Akihiro Shimomura | 1989-04-11 |