Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4849654 | Semiconductor integrated circuit with input protection circuit | — | 1989-07-18 |
| 4822767 | Solvent for chromogenic dye-precursor material for pressure-sensitive recording paper sheet and pressure-sensitive recording paper sheet prepared by using the solvent | Tadashi Nakamura, Youichi Ohhira | 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 | Tadashi Nakamura, Youichi Ohhira | 1989-01-03 |