An acknowledge-back selective call system (100) transmits a first acknowledge-back page (300) that includes a first message data (306) and address information (302) that matches a first predetermined address (140) at an acknowledge-back selective call transceiver (130) and a second acknowledge-back...http://www.google.es/patents/US5748100?utm_source=gb-gplus-sharePatente US5748100 - Reliable wireless message distribution system
