Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4833116 | Heat-sensitive recording material | Tsunefumi Yamori, Sigekazu Shuku | 1989-05-23 |
| 4812438 | Heat-sensitive recording material | Tsunefumi Yamori, Shigekazu Shuku | 1989-03-14 |