Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6451520 | Color photographic silver halide material | Heinrich Odenwalder, Hans Langen | 2002-09-17 |
| 6297385 | Acetanilide couplers | Hans Langen, Heinz Wiesen | 2001-10-02 |
| 6013428 | Color photographic recording material having a 2-equivalent magenta coupler and a white coupler | Hans Langen, Heinrich Odenwalder | 2000-01-11 |
| 5702877 | Color photographic silver halide material | Heinrich Odenwalder, Hans Langen, Heinz-Dieter Schutz | 1997-12-30 |
| 5601968 | Color photographic silver halide material | Beate Weber, Hans Langen, Thomas H ubsch | 1997-02-11 |