Communication system for interactive services with a packet switching interaction channel over a narrow-band circuit switching network, as well as a device for application in such a communication system

  • US 5,930,250 A
  • Filed: 09/04/1996
  • Issued: 07/27/1999
  • Est. Priority Date: 09/08/1995
  • Status: Expired due to Term
  • LCA
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