Method and apparatus for processing signpost signals received by a tag
US7541942B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 10, 2006 |
| Grant date | Jun 2, 2009 |
| Priority date | — |
| Expiry date | Nov 18, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG07C5/008
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A tag receives a wireless signpost signal that contains a signpost code, converts the signpost code into location information representative of a physical location of a signpost that transmitted the received signpost signal, and transmits a wireless tag signal that includes the location information. In a different configuration, a tag receives a wireless signpost signal that includes a signpost code, and determines whether the signpost that generated the received signpost signal is a replacement for a different signpost. If it is a replacement, the tag transmits a wireless tag signal containing an information portion that relates to the signpost replaced by the signpost that generated the received signpost signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.