Transparency viewer

Details Transparency viewer Transparency viewer

1975-07-17

1977-01-04

Stearman, Joel

Photography and optical equipment

Projector or viewer

With provision for transparency magazine

D1602

Patent

active

D02429152

REFERENCES:
patent: D85177 (1931-09-01), Halloran
patent: 2227898 (1941-01-01), Grant
patent: 2908094 (1959-10-01), Mast
patent: 3376782 (1968-04-01), Whitley et al.

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