Issued Patents 1989
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4882311 | Heat-sensitive recording material | Kenji Ikeda, Ken Iwakura | 1989-11-21 |
| 4876233 | Recording material | Keiso Saeki, Shojiro Sano, Katsumi Matsuoka, Ken Iwakura | 1989-10-24 |
| 4870048 | Color developer sheet | Katsumi Matsuoka, Shojiro Sano, Keiso Saeki, Ken Iwakura | 1989-09-26 |
| 4861748 | Recording material | Keiso Saeki, Ken Iwakura | 1989-08-29 |
| 4855282 | Recording material and method for producing the same | Masato Satomura, Ken Iwakura, Akira Igarashi | 1989-08-08 |
| 4808566 | Recording material | Ken Iwakura, Masato Satomura, Katsumi Matsuoka | 1989-02-28 |
| 4803192 | Recording material | Keiso Saeki, Ken Iwakura | 1989-02-07 |
| 4800193 | Recording material | Keiso Saeki, Ken Iwakura, Takekatsu Sugiyama, Masato Satomura | 1989-01-24 |