Issued Patents 1982
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4339492 | Heat-sensitive recording material | Masao Matsukawa, Minematsu Nagashima | 1982-07-13 |
| 4321309 | Heat-sensitive recording material | Masao Matsukawa, Minematsu Nagashima | 1982-03-23 |