Photography and optical equipment – Projector or viewer – With provision for transparency magazine
Patent
1978-05-19
1981-03-03
Kemper, Catherine E.
Photography and optical equipment
Projector or viewer
With provision for transparency magazine
D1601
Patent
active
D02584441
REFERENCES:
patent: D231754 (1974-06-01), Karel
Flynn Robert D.
Kemper Catherine E.
Tizer Company, Ltd.
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