Slide viewer

Details Slide viewer Slide viewer

1982-07-20

1984-12-11

Holtje, Nelson C.

Photography and optical equipment

Projector or viewer

With provision for transparency magazine

Patent

active

D02767295

REFERENCES:
patent: D124324 (1940-12-01), Mihalyi
patent: D178009 (1956-06-01), Rideout
patent: 3373518 (1968-03-01), Bennett
patent: 3626617 (1971-12-01), Frey
patent: 3748765 (1973-07-01), Bass
patent: 4429947 (1984-02-01), Benton
Ritz Camera's "Photo Reference Guide"--1961--p. 53--Airquipt Ultramatic at center.
GAF 1976 Pictorial Products Catalog--p. 29--Automatic Viewer at top.

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