Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4843150 | Pyrazolone or pyridone type water soluble disazo colorant containing one or two triazine rings | Toshio Hihara, Kanzi Shimizu | 1989-06-27 |
| 4837309 | Monohalo substituted triazinyl monoazo dyestuffs for cellulose-containing fibers | Toshio Niwa, Kiyoshi Himeno, Toshio Hihara, Yutaka Kurose | 1989-06-06 |