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Content distribution system, playback apparatus, content server, usage rule server, accounting server, playback method, content transmission method, usage rule transmission method, accounting method, program, and storage medium

  • US 20050240530A1
  • Filed: 04/20/2005
  • Published: 10/27/2005
  • Est. Priority Date: 04/22/2004
  • Status: Abandoned Application
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