A computer-implemented information transfer method includes receiving a trigger message at a server, evaluating a selection rule to select a data flow to be presented to a user at an access device, and sending the data flow to an access device for pop-up presentation in response to the trigger. A server...http://www.google.com.hk/patents/US6721795?utm_source=gb-gplus-share專利 US6721795 - Data transfer server
