Triple-beam projector head

Details Triple-beam projector head Triple-beam projector head

1988-04-21

1991-09-17

Ansher, Bernard

Photography and optical equipment

Projector or viewer

Element or attachment

D16221

Patent

active

D03200302

REFERENCES:
patent: D163504 (1951-05-01), Wottring
patent: D276165 (1984-10-01), Spilman
patent: 2780134 (1957-02-01), Blanks
patent: 3472586 (1969-10-01), Zuili
Electrohome Brochure (title page, p. 36 and drawing page), 1985.

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