Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5702877 | Color photographic silver halide material | Hans Langen, Uwe Dahlhaus, Heinz-Dieter Schutz | 1997-12-30 |
| 5622817 | Color photographic recording material | Johannes Willsau | 1997-04-22 |