Photography and optical equipment – Projector or viewer – With provision for transparency magazine
Patent
1981-02-20
1983-04-12
Holtje, Nelson C.
Photography and optical equipment
Projector or viewer
With provision for transparency magazine
D1603
Patent
active
D02685906
REFERENCES:
patent: D215035 (1969-08-01), Steinbach
patent: 3153293 (1964-10-01), Clarkson
patent: 3748765 (1973-07-01), Bass
Miller Paul D.
Thaler Martin
Holtje Nelson C.
View-Master International Group
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