Issued Patents 1989
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4885272 | Thiadiazolyl-azo-pyrazole yellow dye-donor element for thermal dye transfer | Helmut Weber | 1989-12-05 |
| 4877724 | Method and composition for hardening gelatin | Chung-Yuan Chen, Edgar E. Riecke, Kenneth G. Harbison | 1989-10-31 |
| 4876237 | Thermally-transferable fluorescent 7-aminocoumarins | Gary W. Byers | 1989-10-24 |
| 4871714 | Thermally-transferable fluorescent diphenyl ethylenes | Gary W. Byers | 1989-10-03 |