Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9918910 | Multi-tonal one step dyeing with foam-type pre-treatment solution | Constanze Neuba, Burkhard Mueller | 2018-03-20 |
| 9463150 | Agent for coloring and/or lightening keratinic fibers without ammonia odor | Manuela Ehlert, Irmgard Bender, Mechtild Grunwald, Constanze Neuba, Sabine Babiel +3 more | 2016-10-11 |
| 8858653 | Color intensification by polyquaternium | Frank Janssen | 2014-10-14 |
| 6660045 | Hair colorant preparation | Horst Hoeffkes, Bernd Meinigke, Konstantin Goutsis | 2003-12-09 |