A communication system for limiting communication between communication terminals based, at least in part, upon a separation between communication terminals is disclosed. A first communication channel is coupled with a first communication terminal, where the first communication terminal includes a transmitter....http://www.google.fr/patents/US20070230385?utm_source=gb-gplus-shareBrevet US20070230385 - LOCATION-BASED COMMUNICATION CONTROL SYSTEM
Numéro de demande: 11/534,147 Numéro de publication: US 2007/0230385 A1 Date de dépôt: 21 sept. 2006 Brevet délivré: US7672678 ( Date de délivrance 2 mars 2010)
