US Patent 8659429 In-building location system

An in-building location system for detecting the location of individuals or items within a building utilizes a scanner carried by an individual or an item and RFID tags to provide fiducial points for assisting in the location process, with the tags being scanned by the scanner and in which tag proximity to a scanner provides for accurate in-building location. Accurate location of the scanner relative to multiple tags may be ascertained utilizing triangulation.