A communication system is provided which can be realized in a number of ways to facilitate baggage tracking and recovery. In the most rudimentary realization, the traveler receives a signal from transmitters placed in the baggage which can identify the presence of each item of baggage by a code number...http://www.google.fr/patents/US6265975?utm_source=gb-gplus-shareBrevet US6265975 - Proximity system for baggage
