Double binocular spectacles

Details Double binocular spectacles Double binocular spectacles

1989-10-02

1992-06-30

Ansher, Bernard

Photography and optical equipment

Ophthalmic article

Patent

active

D03274896

REFERENCES:
patent: D314001 (1991-01-01), Nussbickl
patent: 2427469 (1947-09-01), Morley et al.
patent: 2459021 (1949-01-01), Frommer
patent: 3756692 (1973-09-01), Scott
patent: 4179756 (1979-12-01), Lucas
patent: 4637696 (1987-01-01), Wilkins
patent: 4654899 (1987-04-01), Harris

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