In a content distributing system 1, content includes additional information relating to its use, according to characteristics of the content. A data-communication controlling device 40 generates a judgment table associating additional information and a device ID of a client device to which content having...http://www.google.com/patents/US20040010687?utm_source=gb-gplus-sharePatent US20040010687 - Content distributing system and data-communication controlling device
