Issued Patents 1989
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4876233 | Recording material | Keiso Saeki, Katsumi Matsuoka, Masanobu Takashima, Ken Iwakura | 1989-10-24 |
| 4870048 | Color developer sheet | Katsumi Matsuoka, Keiso Saeki, Masanobu Takashima, Ken Iwakura | 1989-09-26 |
| 4849397 | Pressure-sensitive recording medium | Keiso Saeki | 1989-07-18 |
| 4840927 | Desensitizer composition | Keiso Saeki | 1989-06-20 |
| 4820684 | Pressure-sensitive recording sheet | Keiso Saeki | 1989-04-11 |