Sign system with interchangeable lenses
US6880278B1 · kind B1 · utility
12Cited by
6References
12Claims
0Family size
Inventor
Key dates
| Filing date | Sep 16, 2003 |
| Grant date | Apr 19, 2005 |
| Priority date | — |
| Expiry date | Nov 4, 2023 |
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.