Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4405210 | Display device for displaying light images on a dark background | Guenter Baur, Waldemar Greubel, Hans Krueger | 1983-09-20 |
| 4269480 | Process and apparatus for displaying an image in front of an optical contrasting background | Hans Krueger, Karl-Heinz Walter | 1981-05-26 |
| 4244636 | Display device for the representation of bright images on a dark background and a process for operation of the device | Guenter Baur, Waldemar Greubel, Hans Krueger | 1981-01-13 |
| 4240711 | Display device comprising a liquid crystal cell with light valves | Gunter Baur, Waldemar Greubel, Hans Kruger | 1980-12-23 |