Photography and optical equipment – Projector or viewer – With provision for transparency magazine
Patent
1975-12-08
1977-01-11
Stearman, Joel
Photography and optical equipment
Projector or viewer
With provision for transparency magazine
D1605
Patent
active
D02430096
REFERENCES:
patent: D153555 (1949-04-01), Ross
patent: D234370 (1975-02-01), Oberheim
patent: 2777939 (1957-01-01), Spath
Foto-Quelle GmbH
Jordan Frank J.
Rademaker C. A.
Stearman Joel
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