US PATENT SUBCLASS 351 / 58
.~.~ Spring biased or secured by friction members

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


351 /   HD   OPTICS: EYE EXAMINING, VISION TESTING AND CORRECTING

41  DF  SPECTACLES AND EYEGLASSES {29}
57  DF  .~ With auxiliary lenses movable in and out of the optical path (e.g., clip-on type attachments) {1}
58.~.~ Spring biased or secured by friction members

DEFINITION

Classification: 351/58

(under subclass 57) Subject matter wherein the supplemental lenses or glasses are retained on the main eyeglasses by spring loaded clamping members or by circumferentially secured friction clips.

SEE OR SEARCH THIS CLASS, SUBCLASS:

47+, for clip-on antiglare or shading spectacles.