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Expired Canadian patentCanada

Resource-decoupled architecture for a telecommunications switching system

CA 1331215 C · Owner: Bell-Northern Research Ltd. · Inventors: Aczel, Andrew Lazlo; Mellor, Frank; Munter, Ernst August

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Abstract From the Canadian patent

Abstract of the Disclosure The invention provides a telecommunications system exhibiting an architecture having a plurality of functional levels decoupled from one another by data transport systems. The communication facilities connected to the periphery of the system are terminated at the physical level only and the data is channelized for transmission through a channel switch to a first level of processing that provides channel services. The data is then multiplexed and transmitted to system and call processing resources via a frame transport system. - i -

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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.

Why it's free to use

  • Granted August 2, 1994. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 2, 2011.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledSeptember 29, 1989
GrantedAugust 2, 1994
Term endedAugust 2, 2011
Patent numberCA 1331215 C
Classification (IPC)H04Q3/54 +1 more

Timeline

Timeline From CIPO dates

19901993199619992002200520082011Application filedSep 29, 1989Patent grantedAug 2, 1994Term endedAug 2, 2011

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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.