Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5646257 | Azodyestuffs, their preparation and their use | Karin Hassenruck, Peter Wild, Klaus Wunderlich | 1997-07-08 |
| 5639896 | Process for the preparation of N,N'-disubstituted 1,4-diaminoanthraquinones | Dietmar Kalz, Reinold Schmitz, Josef Schroder, Stephan Michaelis | 1997-06-17 |