Issued Patents 1989
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4877721 | Photographic silver halide elements containing filter dyes | Ralph Reed | 1989-10-31 |
| 4871844 | Diazepihium dyes | Thap DoMinh | 1989-10-03 |
| 4857446 | Filter dye for photographic element | Ronda E. Factor | 1989-08-15 |
| 4855221 | Photographic elements having oxonol dyes | Ronda E. Factor | 1989-08-08 |
| 4853366 | Pyrazolidinedione arylidene dye-donor element for thermal dye transfer | Steven Evans, Helmut Weber | 1989-08-01 |
| 4803150 | Radiographic element exhibiting reduced crossover | Robert E. Dickerson, James E. Kelly, Ronda E. Factor | 1989-02-07 |