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Expired Canadian patentCanada

Method and apparatus for reducing skew in a real-time centroid calculation

CA 2456855 C · Owner: Davis, Michael A. · Inventors: Davis, Michael A.; Bellemore, David G.; Fournier, David R.

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Abstract From the Canadian patent

A method and corresponding apparatus for determining the centroid (Vc) of a waveform signal being sampled at a set of parameter values (Vi i=1, ... n) , yielding a corresponding set of sampled amplitudes (Ai i=1, ... n), each , parameter value and corresponding amplitude forming a sampled point (Vi Ai), the method including the steps of: selecting an amplitude at which to create an interpolated point; interpolating a first parameter value corresponding to the amplitude selected in the step of selecting an amplitude; and performing a centroid calculation using only the sampled points with an amplitude greater than a predetermined threshold. The waveform is sometimes sampled in the …

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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 August 8, 2002 and granted July 15, 2014. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 8, 2022.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 8, 2024.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledAugust 8, 2002
GrantedJuly 15, 2014
Term endedAugust 8, 2022
Patent numberCA 2456855 C
Classification (IPC)G01R19/25 +2 more

Timeline

Timeline From CIPO dates

2003200520072009201120132015201720192021Application filedAug 8, 2002Patent grantedJuly 15, 2014Term endedAug 8, 2022

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