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Expired Canadian patentCanada

A method of and a device for speech recognition employing neural network and markov model recognition techniques

CA 2270326 C · Owner: Telecom Italia S.P.A. · Inventors: Fissore, Luciano; Ravera, Franco; Gemello, Roberto

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Abstract From the Canadian patent

A method and a device for recognition of isolated words in large vocabularies are described wherein recognition is performed through two sequential steps (NE MA) using neural networks and Markov models techniques respectively, and the results of both techniques are adequately combined so as to improve recognition accuracy. The means (EL) performing the combination also provide an evaluation of recognition reliability (Fig.1).

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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 28, 1999 and granted February 26, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 28, 2019.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 28, 2021.
  • 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 28, 1999
GrantedFebruary 26, 2002
Term endedApril 28, 2019
Patent numberCA 2270326 C
Classification (IPC)G10L15/26 +2 more

Timeline

Timeline From CIPO dates

2000200220042006200820102012201420162018Application filedApril 28, 1999Patent grantedFeb 26, 2002Term endedApril 28, 2019

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