Issued Patents 1982
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4349670 | Process for the preparation of cationic dyestuffs | Roderich Raue | 1982-09-14 |
| 4310664 | Process for the preparation of pyridine-4-aldehyde phenylhydrazones | Alfred Brack | 1982-01-12 |