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Expired Canadian patentCanada

Automatic call distribution (acd) switching system having distributed processing capability

CA 1312366 C · Owner: Redwood, William J. · Inventors: Dunnigan, William E.; Redwood, William J.; Andrews, Gerald W.

CIPO record

Overview

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Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

An automatic call distribution (ACD) switching system having a plurality of agent/trunk interface circuits for selectively connecting a plurality of telephone trunks to a plurality of agent workstations. The ACD switching system includes at least a first line interface module having a shelf control module for controlling a plurality of carrier card slots. At least one of the carrier card slots includes a carrier card for supporting a plurality of agent/trunk interface circuit "subcards" in closely-aligned parallel relation to the carrier card. Each carrier card and the shelf control module include digital processing circuits and an HDLC transceiver to facilitate the interconnection of first …

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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 January 5, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 5, 2010.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJuly 27, 1989
GrantedJanuary 5, 1993
Term endedJanuary 5, 2010
Patent numberCA 1312366 C
Classification (IPC)H04Q11/04 +2 more

Timeline

Timeline From CIPO dates

1990199319961999200220052008Application filedJuly 27, 1989Patent grantedJan 5, 1993Term endedJan 5, 2010

Sources & verification

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