A viewing information collecting system includes a terminal and a server. The terminal outputs a broadcast program to be viewed, and generates viewing state information indicating a state that the broadcast program is viewed. The server retrieves subscriber information corresponding to ID information...http://www.google.com.tw/patents/US20050138661?utm_source=gb-gplus-share專利 US20050138661 - Viewing information collecting system, viewing information collecting server, and portable terminal
