Adjustable and foldable reading glasses

Details Adjustable and foldable reading glasses Adjustable and foldable reading glasses

1988-12-05

1991-12-10

Dunkins, Bruce W.

Photography and optical equipment

Ophthalmic article

D16103, D16108

Patent

active

D03222624

REFERENCES:
patent: D55468 (1920-06-01), Heilig
patent: D214697 (1969-07-01), Mitchell
patent: 272450 (1883-02-01), Manning
patent: 1214187 (1917-01-01), Krementz
patent: 1681735 (1928-08-01), King
patent: 1733235 (1929-10-01), Obrig et al.
patent: 1907749 (1933-05-01), Dechau
patent: 1972479 (1934-09-01), Ferris
patent: 2076293 (1937-04-01), Colliander
patent: 2132346 (1938-10-01), Richards
patent: 2256501 (1941-09-01), Splaine
patent: 4162542 (1979-07-01), Frank

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