Viewing glass for microfilm

Details Viewing glass for microfilm Viewing glass for microfilm

1976-05-14

1977-10-11

Ansher, Bernard

Photography and optical equipment

Projector or viewer

With provision for transparency magazine

D1602, D2602

Patent

active

D02460459

REFERENCES:
patent: D193411 (1962-08-01), Farber
patent: D196340 (1963-09-01), Peters
patent: 2805500 (1957-09-01), Dixler
patent: 3980394 (1976-09-01), Zapf

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