Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6156296 | Hair cosmetic formulations based on phytosterols and .alpha.-hydroxycarboxylic acids | Jan Riedel, Roland Hengel, Hartmut Schmidt-Lewerkuhne | 2000-12-05 |
| 4844711 | Hair colorants and methods of coloring hair | Udo Hoppe, Karl-Heinz Schrader | 1989-07-04 |