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| Number | Title | Issue Date |
| 5251839 | Snap-open film cartridge In a film cartridge, a shell-like enclosure and a lid are latchingly engaged when the lid is closed, to hold the lid closed, and are latchingly engaged when the lid is opened part way to allow film movement in and out of the enclosure, to prevent the lid ... | 10/12/1993 |
| 4332455 | Archival print and film washer A photographic print and film washer which achieves the washing of photographic sheet material to archival quality. The washer features a liquid supply element for introducing a continuous stream of washer liquid under pressure to the interior compartment... | 06/01/1982 |
| 4185911 | Photographic enlargement and development apparatus A device for enlargement and development of photographs and particularly adapted to efficiently produce posters in a conventional darkroom and to efficiently develop photographs of different sizes. This device includes a posting pegboard, pegs, and clips ... | 01/29/1980 |
| 4032943 | Dental x-ray film processing system A dental x-ray film processor system, including a developer processor and a magazine, for the automatic development of one or a plurality of standard sized dental x-ray films. The films can be of any of the three sizes which are generally designated as st... | 06/28/1977 |
| 4001855 | Rapid-flow washer for photographic sheet material A rapid-flow washer for photographic sheet material, such as prints or films, in the form of a tank having a fluid inlet near the bottom including an aerator for introducing a mixture of air bubbles and water into a horizontal distribution manifold at the... | 01/04/1977 |
| 3998434 | Photographic tray rocker Apparatus for rocking photographic developing trays includes an open frame for holding a plurality of rectangular trays of preselected size nested within the frame. Rocker tabs attached to each end support the frame for rocking motion on a suitable flat s... | 12/21/1976 |
