Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5679508 | Color photographic silver halide material | Cuong Ly, Wolfgang Schmidt | 1997-10-21 |
| 5665532 | Black and white paper with variable gradation | Manfred Peters, Thomas Kaluschke, Hans Ohlschlager | 1997-09-09 |