Issued Patents 1997
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5683859 | Photographic developing composition containing a sludge inhibiting agent and use thereof in the high contrast development of nucleated photographic elements | Ronald J. Nothnagle, Harold I. Machonkin | 1997-11-04 |