Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4857501 | Manufacturing method of a heat sensitive recording material | Toshimasa Usami, Akihiro Shimomura, Sumitaka Tatsuta | 1989-08-15 |
| 4845071 | Heatsensitive recording material | Akihiro Shimomura, Toshimasa Usami | 1989-07-04 |
| 4840933 | Heat sensitive recording material | Toshimasa Usami, Akihiro Shimomura | 1989-06-20 |