Issued Patents 1989
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4855278 | Heat-sensitive recording material | Akira Igarashi, Ken Iwakura | 1989-08-08 |
| 4855282 | Recording material and method for producing the same | Ken Iwakura, Masanobu Takashima, Akira Igarashi | 1989-08-08 |
| 4847236 | Recording material | Ken Iwakura, Akira Igarashi | 1989-07-11 |
| 4835133 | Recording material | Naoto Yanagihara, Kensuke Ikeda, Yuichi Wakata, Ken Iwakura | 1989-05-30 |
| 4808566 | Recording material | Masanobu Takashima, Ken Iwakura, Katsumi Matsuoka | 1989-02-28 |
| 4800193 | Recording material | Keiso Saeki, Masanobu Takashima, Ken Iwakura, Takekatsu Sugiyama | 1989-01-24 |