Issued Patents 2003
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6660045 | Hair colorant preparation | Horst Hoeffkes, Norbert Schettiger, Konstantin Goutsis | 2003-12-09 |
| 6635241 | Aminophenol derivatives and their use in oxidative hair dyes | David Rose, Horst Hoeffkes | 2003-10-21 |