Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4820550 | Process for producing a sheet of color-developer for pressure-sensitive recording paper | Shouzou Aoyagi | 1989-04-11 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4820550 | Process for producing a sheet of color-developer for pressure-sensitive recording paper | Shouzou Aoyagi | 1989-04-11 |