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Expired Canadian patentCanada

Voiceband signal classification

CA 1307342 C · Owner: Benvenuto, Nevio · Inventors: Benvenuto, Nevio

CIPO record

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Abstract From the Canadian patent

A signal is classified as one among a plurality of classifications by employing the autocorrelation (R(k)) of a complex low-pass version of the signal (.gamma.(n)) i.e. the complex, autocorrelation (R(k)). The normalized magnitude (E(k)) of the complex autocorrelation obtained at a prescribed delay interval i.e. "lag", is compared to predetermined threshold values to classify the signal as having one of a plurality of baud rates.

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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 September 8, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 8, 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.
FiledOctober 26, 1987
GrantedSeptember 8, 1992
Term endedSeptember 8, 2009
Patent numberCA 1307342 C
Classification (IPC)H04B14/04

Timeline

Timeline From CIPO dates

19881991199419972000200320062009Application filedOct 26, 1987Patent grantedSep 8, 1992Term endedSep 8, 2009

Sources & verification

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