Inventor
BEYER KARL
CH4 patents
Patents
4 patentsUS4689851ASep 1, 1987
Elastic hinge for eyeglasses
NATIONALE SA31 citations89
US4256388AMar 17, 1981
Bearing screw and its use as a hinge-pin in spectacles
NATIONALE SA30 citations89
US4244081AJan 13, 1981
Hinge for spectacles
NATIONALE SA24 citations80
US4456346AJun 26, 1984
Hinge for spectacles
NATIONALE SA22 citations78