Stage for transparency projection

Details Stage for transparency projection Stage for transparency projection

1977-12-01

1980-07-22

Kemper, Catherine E.

Photography and optical equipment

Projector or viewer

With provision for transparency magazine

D1602

Patent

active

D02560232

REFERENCES:
patent: 3269261 (1966-08-01), Porter
patent: 3537792 (1970-11-01), Furniss et al.
patent: 3544211 (1970-12-01), Albee, Jr.
patent: 3642359 (1972-02-01), Kitch

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