Patent · US Active

Glasses with two position lenses

US7762661B2 · kind B2 · utility

1Cited by
1References
16Claims
0Family size

Inventor

Key dates

Filing dateAug 10, 2009
Grant dateJul 27, 2010
Priority date—
Expiry dateAug 10, 2029

Classification

  • Technology area (CPC G)Physics
  • CPC primaryG02C7/086
  • WIPO fieldOptics
  • WIPO sectorInstruments

Abstract

Glasses such as bifocals, which have refractive lenses which are rotatable at least between two positions. A manual control rotates the lenses such that if bifocal, the relatively small, high magnification zone of each lens can be moved to a high position opposed to the usual low position of fixed bifocals. The user is spared the necessity of holding the head at an awkward posture when viewing overhead objects.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.