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Expired Canadian patentCanada

Method and apparatus for applying multiple speech processing features to a telephone call

CA 2199308 C · Owner: Begeja, Lee · Inventors: Wasilewski, Thomas; Mcmaster, John A.; Begeja, Lee

CIPO record

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Abstract From the Canadian patent

A speech processor uses a plurality of speech processing features to enhance the quality of speech signals received by a user during a telephone call. The activation of a second speech processing feature is delayed for a time duration measured after the initiation of a particular call or measured after the activation of a first speech processing feature. This delay eliminates any interference between the second speech processing feature and the first speech processing feature that is active when the call is initiated. The delay also increases the time it takes for the speech processing features to become fully effective, thus making the enhancement in the quality of the speech signals more …

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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 March 6, 1997 and granted May 30, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 6, 2017.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 6, 2019.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMarch 6, 1997
GrantedMay 30, 2000
Term endedMarch 6, 2017
Patent numberCA 2199308 C
Classification (IPC)H04M3/42 +2 more

Timeline

Timeline From CIPO dates

1998200020022004200620082010201220142016Application filedMarch 6, 1997Patent grantedMay 30, 2000Term endedMarch 6, 2017

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