Folding slide viewer

Details Folding slide viewer Folding slide viewer

1975-11-05

1978-03-14

Burke, Wallace R.

Photography and optical equipment

Projector or viewer

With provision for transparency magazine

D1606

Patent

active

D02474972

REFERENCES:
patent: D181501 (1957-11-01), Somach
patent: 2930286 (1960-03-01), Rabben
patent: 3005378 (1961-10-01), Golden
patent: 3850505 (1974-11-01), Ratliff, Jr.
patent: 3967880 (1976-07-01), Johnson

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