Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4822767 | Solvent for chromogenic dye-precursor material for pressure-sensitive recording paper sheet and pressure-sensitive recording paper sheet prepared by using the solvent | Yoshio Okada, Tadashi Nakamura | 1989-04-18 |
| 4795493 | Solvent for chromogenic dye-precursor material for pressure-sensitive recording paper sheet and pressure-sensitive recording paper sheet prepared by using the solvent | Yoshio Okada, Tadashi Nakamura | 1989-01-03 |
| 4774136 | Solvent for the chromogenic dye-precursor material for a pressure-sensitive recording paper sheet and a pressure-sensitive recording paper sheet prepared by using the solvent | Yoshio Okada, Tadashi Nakamura | 1988-09-27 |
| 4699658 | Solvent for chromogenic dye-precursor material for pressure-sensitive recording paper sheet and pressure-sensitive recording paper sheet prepared by using the solvent | Yoshio Okada, Tadashi Nakamura | 1987-10-13 |
| 4699659 | Solvent for chromogenic dye-precursor material for pressure-sensitive recording paper sheet and pressure-sensitive recording paper sheet prepared by using the solvent | Yoshio Okada, Tadashi Nakamura | 1987-10-13 |