Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4843150 | Pyrazolone or pyridone type water soluble disazo colorant containing one or two triazine rings | Toshio Hihara, Yukiharu Shimizu | 1989-06-27 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4843150 | Pyrazolone or pyridone type water soluble disazo colorant containing one or two triazine rings | Toshio Hihara, Yukiharu Shimizu | 1989-06-27 |