Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4987063 | Gradation variable black- and -white paper | Helmut Kampfer, Walter Patzold | 1991-01-22 |
| 4760015 | Stabilization of a photographically produced silver image using an amino-1,2,4-triazole | Werner Berthold, Paul Marx, Hans hlschlager | 1988-07-26 |
| 4705747 | Color photographic recording material containing a silver halide emulsion and a process for its production | Sieghart Klotzer, Bruno Mucke, Manfred Becker | 1987-11-10 |