Issued Patents 1997
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5609672 | Composition for color development comprising 4-hydroxy-4'-isopropoxydiphenylsulfone, and a wet method for grinding and a dispersible solution for applying the same | Tomoya Hidaka, Shinichi Sato, Yutaka Takashina | 1997-03-11 |