Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5674668 | Photographic recording material | Jorg Hagemann, Gunter Helling | 1997-10-07 |
| 5601968 | Color photographic silver halide material | Hans Langen, Uwe Dahlhaus, Thomas H ubsch | 1997-02-11 |