Title:
Method of producing combined colored and black and white pictures
United States Patent 2132154

Inventors:
Bela, Gaspar
Publication Date:
10/04/1938
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Assignee:
Bela, Gaspar
Primary Class:
430/140
Other Classes:
430/934, 430/394
International Classes:
G03C7/24; G03C7/26; G03C7/22