An integrated system for tracking assets (tools and materials) and personnel associated with a work site. Personnel are equipped with tracking devices having at least geolocation capability. Assets are tagged with RFID tags, which are interrogated at portals, by mobile scanners, or by personnel tracking...http://www.google.de/patents/US7123149?utm_source=gb-gplus-sharePatent US7123149 - Tagging and tracking system for assets and personnel of a commercial enterprise
