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Expired Canadian patentCanada

Operator services using speech processing

CA 2014448 C · Owner: Bell Communications Research, Inc. · Inventors: Velius, George Alfred

CIPO record

Overview

Drawings and full text

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

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Abstract From the Canadian patent

Speech compression technology is utilized to reduce the average working time of an operator on directory assistance calls. In particular, a directory assistance call arriving at an automatic call distributor via a directory assistance trunk is first processed by a speech processing system to compress the initial request for a telephone number. The speech processing system is then connected to an operator position to transmit the processed initial order thereto.

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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

  • Filed April 11, 1990 and granted April 26, 1994. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 11, 2010.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 11, 2012.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledApril 11, 1990
GrantedApril 26, 1994
Term endedApril 11, 2010
Patent numberCA 2014448 C
Classification (IPC)H04M3/00 +2 more

Timeline

Timeline From CIPO dates

1991199319951997199920012003200520072009Application filedApril 11, 1990Patent grantedApril 26, 1994Term endedApril 11, 2010

Sources & verification

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