Photography and optical equipment – Projector or viewer – With provision for transparency magazine
Patent
1978-09-18
1981-04-07
Kemper, Catherine E.
Photography and optical equipment
Projector or viewer
With provision for transparency magazine
D1605
Patent
active
D02588250
REFERENCES:
patent: D233258 (1974-10-01), Prochnow et al.
patent: D233259 (1974-10-01), Prochnow et al.
patent: D237650 (1975-11-01), Ullmann
patent: D241538 (1976-09-01), Swayze
patent: D250475 (1978-12-01), Kando
Kemper Catherine E.
Rollei of America, Inc.
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