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United States Patent 2397272

Inventors:
Land, Edwin H.
Publication Date:
03/26/1946
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Assignee:
POLAROID CORP
Primary Class:
359/465
Other Classes:
40/427, 359/489, 283/77, 40/1.500, 273/148R, 283/91, 283/90, 430/15, 355/40
International Classes:
G09F3/00