Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5830626 | Photographic developing composition containing anti-sludging agent and use thereof | Hugh G. McGuckin, John S. Badger, Jerry L. Willer | 1998-11-03 |
| 5683859 | Photographic developing composition containing a sludge inhibiting agent and use thereof in the high contrast development of nucleated photographic elements | Jeffrey Richard Sefl, Harold I. Machonkin | 1997-11-04 |
| 5457011 | Photographic developing composition containing a sludge inhibiting agent and use thereof in the high contrast development of nucleated photographic elements | Gordon R. Lehr | 1995-10-10 |
| 4269929 | High contrast development of photographic elements | — | 1981-05-26 |