Photographic method of obtaining a film transparency
United States Patent 2751294
US Patent References:
Process of making printing plates
- - 1669821


Inventors:
Morrison, George L.
Publication Date:
06/19/1956
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Assignee:
Morrison, George L.
Primary Class:
430/4
Other Classes:
430/952, 430/396, 430/951, 430/394
International Classes:
G03F1/06