Issued Patents 2004
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6797012 | Solid colorant for keratin fibers | Erik Schulze zur Wiesche, Detlef Hollenberg | 2004-09-28 |
| 6790240 | Solid colorant for keratin fibers | Erik Schulze zur Wiesche, Britta Bossmann, Detlef Hollenberg | 2004-09-14 |
| 6673123 | Solid colorant for keratin fibers | Erik Schulze zur Wiesche, Detlef Hollenberg | 2004-01-06 |