Focusing knob for binoculars

Details Focusing knob for binoculars Focusing knob for binoculars

1978-03-17

1979-02-27

Ansher, Bernard

Photography and optical equipment

Projector or viewer

With provision for transparency magazine

350 77, D1606

Patent

active

D02511975

REFERENCES:
patent: 4066329 (1978-01-01), Van Exel

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