Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4872883 | Mixtures of monoazo dyestuffs | Ulrich Buhler, Manfred Hahnke | 1989-10-10 |
| 4812143 | Liquid formulations of disperse dyestuffs containing inorganic oxides or silicates for dyeing textile materials | Ulrich Buhler, Erwin Dietz | 1989-03-14 |