Transparency mount for overhead projectors

Details Transparency mount for overhead projectors Transparency mount for overhead projectors

1983-02-22

1987-01-20

Holtje, Nelson C.

Photography and optical equipment

Projector or viewer

With provision for transparency magazine

D16 38

Patent

active

D02878585

REFERENCES:
patent: D230516 (1974-02-01), Yanagawa
patent: D234628 (1975-03-01), Hrabik
patent: D256023 (1980-07-01), Constantine
patent: D267181 (1982-12-01), Jost
patent: D273959 (1984-05-01), VanDyken
patent: 2338189 (1944-01-01), Libby
patent: 2958970 (1960-11-01), Townsley
patent: 3478456 (1960-11-01), Mundt
patent: 4237633 (1980-12-01), Murrell

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