Spectacles frames for shaped lens elements
US6505930B1 · kind B1 · utility
6Cited by
16References
41Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 18, 2001 |
| Grant date | Jan 14, 2003 |
| Priority date | — |
| Expiry date | Jul 18, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02C7/02
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
The disclosure relates to spectacle frames including frames adapted to engage ovaline edges of lens elements having a toroidal or changing base curvature. In a preferred embodiment the frame shape corresponds to the edge of front surfaces of a pair of lens elements having a high curvature which is common to various prescriptions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.