Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5663040 | Silver halide photographic elements containing 2-equivalent 5-pyrazolone magenta couplers | Massimo Bertoldi, Anna Marie Canuti, Ferdinando Orengo | 1997-09-02 |
| 5646297 | Process for preparation of 2-equivalent 4-arylthio-5-pyrazolone magenta couplers | Anna Maria Canuti | 1997-07-08 |