Issued Patents 1982
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4325870 | Process for the preparation of 2,6-diaminopyridine-azo dyestuffs and of their precursors | Ernst Heinrich | 1982-04-20 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4325870 | Process for the preparation of 2,6-diaminopyridine-azo dyestuffs and of their precursors | Ernst Heinrich | 1982-04-20 |