Issued Patents 1997
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5683863 | Photographic silver halide material | Peter Bergthaller, Peter Bell, Ralf Buscher, Johannes Willsau, Thomas Stetzer | 1997-11-04 |
| 5679504 | Color photographic silver halide material | Ralf Buscher, Peter Bell, Johannes Willsau | 1997-10-21 |
| 5667956 | Silver halide recording material | Michael Missfeldt, Johannes Willsau, Ralf Buscher, Peter Bell | 1997-09-16 |
| 5599657 | Color photographic silver halide material | Detlef Brennecke, Johannes Willsau, Ralf B uscher, Peter Bell, Lothar Endres | 1997-02-04 |