Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5695917 | Combination of yellow filter dye and 4-equivalent pyrazolone magenta coupler | Margaret J. Helber, Mary Christine Brick | 1997-12-09 |
| 5629140 | Photographic elements containing scavengers for oxidized developing agent | John W. Harder, Stephen P. Singer | 1997-05-13 |