Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4889841 | Thermosensitive recording materials | Takao Kosaka, Naomasa Koike, Masahiro Higuchi | 1989-12-26 |
| 4880767 | Recording material | Shigetoshi Hiraishi, Mitsuru Fuchigami, Kazuo Kabashima | 1989-11-14 |