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CPC
G03B23/105
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Parent Industries
G
PHYSICS
G03
Photography
G03B
APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES ACCESSORIES THEREFOR
G03B23/00
Devices for changing pictures in viewing apparatus or projectors
Current Industry
G03B23/105
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