Issued Patents 1989
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4876233 | Recording material | Keiso Saeki, Shojiro Sano, Masanobu Takashima, Ken Iwakura | 1989-10-24 |
| 4871713 | Heat-sensitive recording material | Kensuke Ikeda, Ken Iwakura | 1989-10-03 |
| 4870048 | Color developer sheet | Shojiro Sano, Keiso Saeki, Masanobu Takashima, Ken Iwakura | 1989-09-26 |
| 4808566 | Recording material | Masanobu Takashima, Ken Iwakura, Masato Satomura | 1989-02-28 |