Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4844711 | Hair colorants and methods of coloring hair | Udo Hoppe, Klaus Korbacher | 1989-07-04 |
| 4824823 | Microcapsules containing oils and soluble color reaction components, their manufacture and use in color reaction recording systems | Gunter Pietsch | 1989-04-25 |