A wireless communication system for location based schedule management (10) includes a plurality of wireless communication devices (40), including a wireless communication device (32) and a backup wireless communication device (47); a system controller (24) for generating a message; a RF transmitter...http://www.google.de/patents/US6484033?utm_source=gb-gplus-sharePatent US6484033 - Wireless communication system for location based schedule management and method therefor
