Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4985043 | Mixtures of monoazo dyes containing halogen and cyano substituents | Ulrich Buhler, Manfred Hahnke, Reinhard Kuhn | 1991-01-15 |
| 4582509 | Mixtures of monoazo dyestuffs | Ulrich Buhler, Manfred Hahnke, Albert Bode, Kurt Roth | 1986-04-15 |