Photography and optical equipment – Projector or viewer – With provision for transparency magazine
Patent
1978-03-08
1980-08-19
Rosen, Sam
Photography and optical equipment
Projector or viewer
With provision for transparency magazine
D16 83, 350 90, 356244, D1606
Patent
active
D02564700
REFERENCES:
patent: 2761558 (1956-09-01), McLean
Kelman Kurt
Rosen Sam
Shandon Southern Products Limited
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