US PATENT SUBCLASS 351 / 48
.~.~.~ Spring biased

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

41  DF  SPECTACLES AND EYEGLASSES {29}
44  DF  .~ With antiglare or shading {4}
47  DF  .~.~ Removable and/or adjustable filters or screens (e.g., clip-on type) {1}
48.~.~.~ Spring biased

DEFINITION

Classification: 351/48

(under subclass 47) Subject matter, wherein the filters or screens are securely mounted on or readily attached to spectacles by integral or bridge-type spring means which hold

the light absorbing mediums in different operative positions desired by the wearer.

(1) Note. See (1) Note under subclass 47 above.