Photography and optical equipment – Projector or viewer – With provision for transparency magazine
Patent
1979-08-13
1983-03-15
Caun, Peter M.
Photography and optical equipment
Projector or viewer
With provision for transparency magazine
D1605
Patent
active
D02682680
REFERENCES:
patent: 1712147 (1929-05-01), Kelsea
patent: 3610915 (1971-10-01), Moore
patent: 3643085 (1972-02-01), Durand
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