A message transmission system (100) and method for providing flexible roaming to a receiving device (126) which includes a code memory (422) which stores addresses of a first type (1202) to enable reception of messages within a local geographic area, and an address of a second type (1214) to enable reception...http://www.google.de/patents/US5956640?utm_source=gb-gplus-sharePatent US5956640 - Messaging system providing flexible roaming and method therefor
