Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4853319 | Photographic silver halide element and process | Brian H. Johnston, Kenneth N. Kilminster, David C. Vogel, Paul R. Buckland | 1989-08-01 |
| 4827019 | Sterically hindered aromatic carboxylic esters | — | 1989-05-02 |