A game database storing a game program as pay data, a distribution server, and an account server are provided within a service provider side device. The account server sends, through a radio network, a part of a game program to a storage unit in a service user side device, before the arrival of the fixed...http://www.google.com.au/patents/US7174309?utm_source=gb-gplus-sharePatent US7174309 - Data distribution system
