Photography and optical equipment – Projector or viewer – With provision for transparency magazine
Patent
1977-12-19
1980-06-10
Kemper, Catherine E.
Photography and optical equipment
Projector or viewer
With provision for transparency magazine
D1601
Patent
active
D02553627
REFERENCES:
patent: D220406 (1971-04-01), Hardy
patent: 3613538 (1971-10-01), Horberg, Jr.
patent: 3732368 (1973-05-01), Mahlab
patent: 3993866 (1976-11-01), Pearl et al.
Design-Mar. 1964-p. 8, Quartet Lamp #1.
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