Photography and optical equipment – Projector or viewer – With provision for transparency magazine
Patent
1978-10-27
1982-06-08
Kemper, Catherine E.
Photography and optical equipment
Projector or viewer
With provision for transparency magazine
D1603
Patent
active
D02648504
REFERENCES:
patent: D250678 (1979-01-01), Hall
patent: 3560083 (1971-02-01), Brownscombe
patent: 3807845 (1974-04-01), Peters et al.
patent: 3997258 (1976-12-01), Omi
Kemper Catherine E.
Kibbutz Sheluchot
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