Transparency viewer

Details Transparency viewer Transparency viewer

1988-10-27

1991-07-23

Feifer, Melvin B.

Photography and optical equipment

Projector or viewer

Integrated unit

Patent

active

D03184781

REFERENCES:
patent: D183462 (1958-09-01), Maiershofer et al.
patent: D239467 (1976-04-01), Ouden
patent: D256869 (1980-09-01), Arnone
patent: D266094 (1982-09-01), Gher et al.
patent: 4574505 (1986-03-01), Chiodo

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