Stereoscopic viewer

Details Stereoscopic viewer Stereoscopic viewer

1986-05-30

1990-01-23

Feifer, Melvin B.

Photography and optical equipment

Projector or viewer

Stereoscopic

D16221

Patent

active

D03056678

REFERENCES:
patent: 171049 (1953-12-01), Romrell
patent: 174902 (1955-06-01), Gilson
patent: 175215 (1955-07-01), Gilson
patent: 184356 (1959-02-01), Kellogg
patent: 185670 (1959-07-01), Kellogg
patent: 189006 (1960-10-01), Golden
patent: D247497 (1978-03-01), Wolfe
patent: 2189285 (1940-02-01), Gruber
patent: 2511334 (1950-06-01), Gruber
Hong Kong Enterprise-11/85, p. 70, (items in lower -right).

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