Overhead projector

Details Overhead projector Overhead projector

1986-08-05

1990-02-06

Ansher, Bernard

Photography and optical equipment

Projector or viewer

Overhead or opaque type

Patent

active

D03059049

REFERENCES:
patent: D182374 (1958-03-01), Miller
patent: 3762809 (1973-10-01), Kato et al.
patent: 4565430 (1986-01-01), Grunwald
patent: 4588271 (1986-05-01), Emura
patent: 4696557 (1987-09-01), Tomizuka

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