Issued Patents 1994
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5314790 | Tone control of photographic silver images | Stephen A. Hershey, J. Ramon Vargas | 1994-05-24 |
| 5310642 | DIR couplers with hydrolyzable inhibitors for use in high pH processed films | J. Ramon Vargas, Phillip D. Knight | 1994-05-10 |
| 5296337 | Process for retouching photographic images containing a dye having a cleavable ballast | J. Ramon Vargas, John W. Harder, Phillip D. Knight, Lynda D. Weber | 1994-03-22 |
| 5292627 | Tone control of photographic images | Stephen A. Hershey, J. Ramon Vargas | 1994-03-08 |
| 5292631 | Radiographic elements with improved covering power | Stephen A. Hershey, J. Ramon Vargas | 1994-03-08 |