Patent · US Expired

Sign system with interchangeable lenses

US6966136B2 · kind B2 · utility

13Cited by
6References
7Claims
0Family size

Inventor

Key dates

Filing dateNov 4, 2004
Grant dateNov 22, 2005
Priority date—
Expiry dateNov 4, 2024

Classification

  • Technology area (CPC E)Fixed Constructions
  • CPC primaryE01F13/02
  • WIPO fieldCivil engineering
  • WIPO sectorOther fields

Abstract

A transparent, reversible sign for use in traffic barricades.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.