An instant messaging (IM) server provides post delivery instant message redirection when a first device having a first media access control (MAC) address is logged onto the IM server and subsequently a second device having a second media access control address logs onto the IM server. An instant message...http://www.google.de/patents/US7552183?utm_source=gb-gplus-sharePatent US7552183 - Apparatus for post delivery instant message redirection
