High speed photographic developer
United States Patent 2710257

Inventors:
Joseph, Dephoure
Publication Date:
06/07/1955
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Assignee:
Joseph, Dephoure
Primary Class:
430/439
Other Classes:
430/482, 430/466, 430/486, 430/407, 430/934, 430/489
International Classes:
G03C5/30
Other References:
None