Direction-indicating surface marker strip for roadways and the like
US4236788A · kind A · utility
26Cited by
5References
8Claims
0Family size
Inventor
Key dates
| Filing date | Oct 23, 1978 |
| Grant date | Dec 2, 1980 |
| Priority date | — |
| Expiry date | Oct 23, 1998 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE01F9/578
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
This disclosure is concerned with providing a marker strip for attachment to roadways and other surfaces, comprising an upper layer of spaced transverse prisms and a lower layer of retroreflective sheeting, providing direction color discrimination, where desired, and substantially constant brightness of light retroreflection with distance over wide angles of incident light upon the strip.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.