Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4828957 | Two-color heat-sensitive recording material with 2-hydroxy-3-naphthoanilide as both coupler and color developing agent | Tosaku Okamoto, Mitsuru Kondo | 1989-05-09 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4828957 | Two-color heat-sensitive recording material with 2-hydroxy-3-naphthoanilide as both coupler and color developing agent | Tosaku Okamoto, Mitsuru Kondo | 1989-05-09 |