Issued Patents All Time
Showing 51–54 of 54 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4417820 | Time-keeping device, especially a quartz-controlled clock | Horst Schaefer | 1983-11-29 |
| 4415273 | Microprocessor driven digital display alarm clock | Harald Hoffman, Lothar Pacher, Dan-Corneliu Raducanu | 1983-11-15 |
| 4314809 | Novel coupler components for oxidation hair dyes, the manufacture thereof, and hair colorants | David Rose, Edgar Lieske, Gunther Konrad | 1982-02-09 |
| 4226595 | Oxidation hair-coloring preparation based upon N,N-bis-(.beta.-hydroxyethyl)-m-phenylenediamines | David Rose, Edgar Lieske | 1980-10-07 |