Light box assembly for an overhead projector

Details Light box assembly for an overhead projector Light box assembly for an overhead projector

1987-04-10

1990-04-03

Rademaker, Charles A.

Photography and optical equipment

Projector or viewer

Element or attachment

D16232

Patent

active

D03070301

REFERENCES:
patent: D150317 (1948-07-01), Roysher
patent: D217103 (1970-04-01), Field et al.
patent: D219405 (1970-12-01), Nemesnyik
patent: D244602 (1977-06-01), Mango et al.
patent: D245165 (1977-12-01), Drake
patent: 3247762 (1966-04-01), Peters
patent: 3542463 (1970-11-01), Klein
patent: 4089599 (1978-05-01), Kuboshima

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