Photography and optical equipment – Projector or viewer – With provision for transparency magazine
Patent
1977-11-15
1980-08-05
Kemper, Catherine E.
Photography and optical equipment
Projector or viewer
With provision for transparency magazine
D1605
Patent
active
D02562499
REFERENCES:
patent: 2682603 (1954-06-01), Dine et al.
patent: 2760048 (1956-08-01), Schulte
patent: 3855602 (1974-12-01), Hoos
Kemper Catherine E.
McClellan, Sr. John F.
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