An apparatus and method are provided for entering and transmitting a message at a future delivery time to a receiving device that is coupled either to a telephony-centric network or to a data-centric network. The apparatus includes a message server, a data-centric network server, and a telephony-centric...http://www.google.de/patents/US6944273?utm_source=gb-gplus-sharePatent US6944273 - Apparatus and method for future transmission of device-independent messages
