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Filter darkroom light
United States Patent 3405262
US Patent References:
Process and apparatus for producing photographic negatives
- - 1379949
Color selective reflector
- - 2412496
Adjustable filter darkroom light
- - 2545274
Long wavelength transmitting optical interference filters
- - 2742819
Reflector
- - 2799773
Inventors:
Dolan, James J.
Degenkolb, David J.
Publication Date:
10/08/1968
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Download PDF 3405262
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Assignee:
TEXTRON ELECTRONICS INC
Primary Class:
362/293
Other Classes:
362/295, 362/290, 362/803
International Classes:
G03B15/02
;
G03D17/00
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