Retroreflective article
US7938549B2 · kind B2 · utility
4Cited by
18References
15Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 30, 2006 |
| Grant date | May 10, 2011 |
| Priority date | — |
| Expiry date | Feb 28, 2027 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2457
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A retroreflective article with excellent wide-angle characteristics is provided. Entrance angle characteristics, observation angle characteristics, and rotation angle characteristics are improved. In a retroreflective article, an assembly of multidirectional retroreflective elements is formed, in which either five, or seven or more unit elements are formed so as to share two common base edges forming the triangular base face of the unit elements and a common vertex at which the common base edges intersect, with an adjacent retroreflective element.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.