Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4600681 | Color photographic material with azo dicyanoimidazole dyes | Peter Bergthaller, Hans-Volker Runzheimer, Gerhard Wolfrum | 1986-07-15 |
| 4521506 | Monoazo pyridinol dyes chelated or capable of being chelated with metal ions and their use for image production | Rudolf Stolzenburg, Peter Bergthaller, Gerhard Wolfrum | 1985-06-04 |
| 4474854 | Photographic material containing a layer capable of being dyed by organic dyes | Peter Bergthaller | 1984-10-02 |
| 4446219 | Photographic material comprising a layer with Ni complex of 2,2'-bisphenol | Peter Bergthaller | 1984-05-01 |
| 4383021 | Image-receiving element for the dye diffusion transfer process with metal complex of diazabicyclooctane | Peter Bergthaller, Guenter Helling | 1983-05-10 |