Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4857501 | Manufacturing method of a heat sensitive recording material | Toshimasa Usami, Akihiro Shimomura, Seiji Hatakeyama | 1989-08-15 |
| 4824721 | Donor sheet for heat transfer recording | Yutaka Fujita | 1989-04-25 |