Double piston spring hinge eyeglasses

Details Double piston spring hinge eyeglasses Double piston spring hinge eyeglasses

1996-07-19

1998-05-19

Barkai, Raphael

Photography and optical equipment

Ophthalmic article

Eyeglasses, eyewear, or frame therefor

D16327, D16334, 1606

Patent

active

D03944476

REFERENCES:
patent: D87189 (1932-06-01), Baker
patent: D132199 (1942-04-01), Nerney
patent: D196880 (1963-11-01), Magnus
patent: D285092 (1986-08-01), Baum
patent: 4792221 (1988-12-01), Parks et al.
patent: 5115540 (1992-05-01), Delorme
patent: 5450142 (1995-09-01), Bruel

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