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Expired Canadian patentCanada

Packet error rate measurements by distributed controllers

CA 1204843 A · Owner: Western Electric Company, Incorporated · Inventors: Turner, Jonathan S.

CIPO record

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Abstract From the Canadian patent

Abstract, A trunk controller and processor arrangement for monitoring the error rate occurring in packets received from a high speed trunk. Within a packet switching system, packets comprising logical addresses and voice/data information are communicated through the system by packet switching networks which are interconnected by high speed digital trunks with each of the latter being directly terminated on both ends by trunk controllers. During initial call setup of a particular call, central processors associated with each network in the desired route store the necessary logical to physical address information in the controllers which perform all logical to physical address translation on …

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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 May 20, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 20, 2003.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledNovember 21, 1983
GrantedMay 20, 1986
Term endedMay 20, 2003
Patent numberCA 1204843 A
Classification (IPC)H04Q1/20 +2 more

Timeline

Timeline From CIPO dates

1984198619881990199219941996199820002002Application filedNov 21, 1983Patent grantedMay 20, 1986Term endedMay 20, 2003

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