Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4847191 | Silver halide photographic materials having rhodium cyanide dopants | — | 1989-07-11 |
| 4828962 | High contrast scanner photographic elements employing ruthenium and iridium dopants | Keith A. Penfound | 1989-05-09 |