Photography and optical equipment – Projector or viewer – Overhead or opaque type
Patent
1989-09-29
1991-12-10
Feifer, Melvin B.
Photography and optical equipment
Projector or viewer
Overhead or opaque type
D16229
Patent
active
D03222640
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Aronovich Adir
Dukane Corporation
Feifer Melvin B.
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