Photography and optical equipment – Projector or viewer – With provision for transparency magazine
Patent
1978-04-10
1980-09-23
Ansher, Bernard
Photography and optical equipment
Projector or viewer
With provision for transparency magazine
D26 39, D1608
Patent
active
D02570440
REFERENCES:
patent: D218537 (1970-08-01), Bushon
patent: D234711 (1975-04-01), Pies
patent: 2122753 (1938-07-01), Ridabock
patent: 2771003 (1956-11-01), Lyndall et al.
patent: 3753610 (1973-08-01), Samuel
Ansher Bernard
Bausch & Lomb Incorporated
Parker Frank C.
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