US PATENT SUBCLASS 351 / 73
.~.~.~.~ With flat spiral springs


Current as of: June, 1999
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351 /   HD   OPTICS: EYE EXAMINING, VISION TESTING AND CORRECTING

41  DF  SPECTACLES AND EYEGLASSES {29}
65  DF  .~ Pince-nez type (including pince-nez bridges, nose grips and nose pads therefor) {8}
71  DF  .~.~ With spring biased nose grips {1}
72  DF  .~.~.~ With pivoting levers {3}
73.~.~.~.~ With flat spiral springs


DEFINITION

Classification: 351/73

(under subclass 72) Devices wherein the grips are supported and/or biased by a strip of flat spiral or leaf-type spring.