Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4889841 | Thermosensitive recording materials | Takao Kosaka, Masahiro Miyauchi, Naomasa Koike | 1989-12-26 |
| 4837197 | Heat-sensitive recording material | Haruhiko Ikeda, Hirokazu Ohkura | 1989-06-06 |
| 4809267 | Packet data communication system with ring type transmission line | Haruki Fukuda, Kenshi Tazaki, Masahiro Matsuda, Tomohiko Awazu | 1989-02-28 |