Retroreflective structures having a helical geometry
US8033671B1 · kind B1 · utility
11Cited by
8References
42Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 11, 2008 |
| Grant date | Oct 11, 2011 |
| Priority date | — |
| Expiry date | Nov 20, 2029 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S359/90
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Retroreflective structures and methods of forming the same comprise a body of material extending along a helical path about a longitudinal axis and a plurality of retroreflective optical elements positioned along the helical path of the body of material, and constructed and arranged to retroreflect electromagnetic energy directed from a range of angular orientations about the longitudinal axis.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.