Flip-up sunglasses

Details Flip-up sunglasses Flip-up sunglasses

1991-03-18

1993-07-06

Ansher, Bernard

Photography and optical equipment

Optical article not elsewhere specified

Lens or objective

Patent

active

D03371247

REFERENCES:
patent: 1857284 (1932-05-01), Nelson
patent: 2475471 (1949-07-01), Brown
patent: 2481960 (1949-09-01), Wall
patent: 2538607 (1951-01-01), Vaca
patent: 2614255 (1952-10-01), Ellis
patent: 2668952 (1954-02-01), Kobashikawa
patent: 2752598 (1956-07-01), Abels
patent: 4304005 (1981-12-01), Danley, Sr.

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