Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4861700 | Photographic element containing yellow filter dyes having tricyanovinyl groups | Leslie Shuttleworth | 1989-08-29 |
| 4808502 | Photographic recording material comprising a magenta dye image forming coupler compound | — | 1989-02-28 |
| 4797357 | Light-stable reducible compounds and analytical compositions, elements and methods utilizing same | Albert J. Mura | 1989-01-10 |