Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8736842 | Actuation and evaluation circuit, measuring device and method for measuring the concentration of a gas | Helmut Scherer, Stefan Menninger | 2014-05-27 |
| 6090161 | Colorants for keratin fibers comprising a 5,6-dihydroxyindoline derivative and a secondary intermediate | Horst Hoeffkes, Hiroshi Tanaka | 2000-07-18 |
| 5114428 | Hair dye preparation | Horst Hoeffkes, Fritz Lange | 1992-05-19 |
| 5089257 | Preparation for the simultaneous coloring, washing, and conditioning of human hair | Peter Flemming | 1992-02-18 |
| 4988017 | Dual chamber aerosol container | Karl Giede, Hans Schneider, Dietholf Mehl | 1991-01-29 |
| 4927627 | Emulsion-form hydrogen peroxide preparations for the bleaching and oxidative dyeing of hair | Winifried Neuhaus | 1990-05-22 |
| 4784667 | Oxidation hair dyes comprising diamino-substituted pyridines and amino-substituted aromatics as precursors | Norbert Maak, Peter Flemming | 1988-11-15 |
| 4698065 | Liquid oxidation hair dye with phase stabilizer | Horst Hoeffkes | 1987-10-06 |