Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5677114 | Photographic element containing yellow dye-forming coupler comprising a dye light stability enhancing ballast and process | John DiCillo | 1997-10-14 |
| 5610003 | Two-equivalent magenta photographic couplers with activity-modifying ballasting groups | — | 1997-03-11 |