Parabolic and hyperbolic aspheric eyewear
US6254236A · kind A · utility
19Cited by
14References
48Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 5, 1999 |
| Grant date | Jul 3, 2001 |
| Priority date | — |
| Expiry date | Aug 5, 2019 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61F9/029
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
Piano lenses and associated eyewear incorporating parabolic and hyperbolic arcs are provided which are particularly useful in safety and recreational applications.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.