Negative viewer

Photography and optical equipment – Projector or viewer – Stereoscopic

Patent

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Details

D16225, 1602

Patent

active

D04245946

REFERENCES:
patent: D150573 (1948-08-01), Ingram
patent: 2814966 (1957-12-01), Crossley
patent: 3468599 (1969-09-01), Jordan
GAF Corporation Pictorial Products Catalog, 1976 p. 13.

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