Transparency viewer

Details Transparency viewer Transparency viewer

1989-03-23

1992-09-15

Ansher, Bernard

Photography and optical equipment

Projector or viewer

Integrated unit

Patent

active

D03294480

REFERENCES:
patent: D164153 (1951-08-01), Barth
patent: D256869 (1980-09-01), Arnone
patent: D318478 (1991-07-01), Wah Lo
patent: 1142143 (1915-06-01), Cauger
patent: 2795067 (1957-06-01), Walker
patent: 4426798 (1984-01-01), Saunders
patent: 4736538 (1988-04-01), Pierce et al.
patent: 4756616 (1988-07-01), Min et al.

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