Photography and optical equipment – Projector or viewer – With provision for transparency magazine
Patent
1976-02-17
1977-03-08
Ansher, Bernard
Photography and optical equipment
Projector or viewer
With provision for transparency magazine
D1606
Patent
active
D02436019
REFERENCES:
patent: 3490846 (1970-01-01), Kasper
patent: 3795377 (1974-03-01), Dietrich
patent: 3804486 (1974-04-01), Van Exel et al.
patent: 3826559 (1974-07-01), Berliner et al.
Leeming, Sr. Arthur B.
Speaker Edwin A.
Ansher Bernard
Bausch & Lomb Incorporated
Parker Frank C.
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