US PATENT SUBCLASS 351 / 54
.~ Invertible or reversible multifocal type

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

41  DF  SPECTACLES AND EYEGLASSES {29}
54.~ Invertible or reversible multifocal type

DEFINITION

Classification: 351/54

(under subclass 41) Subject matter wherein spectacles with multifocal lenses may be inverted or turned upside down as a unit, or in which the lenses, per se, may be revolved inside the frame so that bifocal segments may stand at the top or bottom of the lenses.

SEE OR SEARCH THIS CLASS, SUBCLASS:

115, for reversible or axially rotatable temples.