Transmissive type overhead projector

Details Transmissive type overhead projector Transmissive type overhead projector

1992-10-22

1994-08-16

Ansher, Bernard

Photography and optical equipment

Projector or viewer

Overhead or opaque type

Patent

active

D03497151

REFERENCES:
patent: D197258 (1963-12-01), Highberger
patent: D216565 (1970-02-01), Holderied
patent: D221901 (1971-09-01), Patla
patent: D229780 (1974-01-01), Ishida
patent: D244602 (1977-06-01), Mango et al.
patent: 3416857 (1968-12-01), Lookabaugh
patent: 3979160 (1976-09-01), Anderson et al.
patent: 5027219 (1991-06-01), Stuttler
Overhead Projectors Catalog, 1968 p. 3.

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