Issued Patents 1994
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5328796 | Diazo type recording material utilizing microencapsulated diazo compound, a coupler and a hydroxyphenylsulfone derivative | Taketatsu Sugiyama, Makoto Ohno, Toshiharu Tanaka | 1994-07-12 |
| 5304452 | Heat sensitive diazo type recording material utilizing microencapsulated diazo compound and a coupling component | Makoto Ohno, Toshiharu Tanaka | 1994-04-19 |