Direction-indicating surface marker and the like
US4069787A · kind A · utility
17Cited by
6References
2Claims
0Family size
Inventor
Key dates
| Filing date | Apr 11, 1975 |
| Grant date | Jan 24, 1978 |
| Priority date | — |
| Expiry date | Apr 11, 1995 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE01F9/578
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A distinctively and unambiguously marking of the directions of travel on motoring highways, airports and other surfaces with the aid of a thin novel saw-tooth marker strip that is adhered to the traveling surface and has distinctively colored successive surfaces of retroreflecting materials, including transverse cylindrical refractive elements embedded between wedges in the thin strip.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.