Photography and optical equipment – Projector or viewer – With provision for transparency magazine
Patent
1978-02-13
1980-07-29
Kemper, Catherine E.
Photography and optical equipment
Projector or viewer
With provision for transparency magazine
D16 27, D1603
Patent
active
D02561271
REFERENCES:
patent: D201590 (1965-07-01), Sigmond
patent: D228578 (1973-10-01), Glaros et al.
patent: D230196 (1974-01-01), Fitzgerald
Bell & Howell Company
Kemper Catherine E.
Samlan Alan B.
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