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Expired Canadian patentCanada

Speaker-trained speech recognizer having the capability of detecting confusingly similar vocabulary words

CA 1311059 C · Owner: Roe, David Bjorn · Inventors: Roe, David Bjorn; Dautrich, Bruce Allen; Goeddel, Thomas William

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Abstract From the Canadian patent

A Speaker-Trained Speech Recognizer Having The Capability of Detecting Confusingly Similar Vocabulary Words, Abstract, During a training sequence a speaker-trained, speech recognizer detects and signals the speaker when vocabulary word pairs are potentially confusing to the recognizer. Each vocabulary word is converted into parameters representing a predetermined reference model of that word. The feature signals of a subsequent potential vocabulary word are compared against the reference model of each vocabulary word previously stored in the recognizer memory. The speaker is signaled when the potential vocabulary word is confusingly similar to one of the existing vocabulary words.

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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 December 1, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 1, 2009.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledFebruary 26, 1987
GrantedDecember 1, 1992
Term endedDecember 1, 2009
Patent numberCA 1311059 C
Classification (IPC)G10L15/06

Timeline

Timeline From CIPO dates

19881991199419972000200320062009Application filedFeb 26, 1987Patent grantedDec 1, 1992Term endedDec 1, 2009

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