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Expired Canadian patentCanada

Narrowband signal recognition for emi measurements

CA 1316983 C · Owner: Hewlett-Packard Company · Inventors: Taylor, John B.; Ellis, Michael K.

CIPO record

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Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

Abstract of the Disclosure, A test method and apparatus to aid a site operator in discriminating between signals measured at different times, as well as enabling a level of automation which is appropriate using state-of the-art instrumentation for performing EMI measurements, such as open-site EMI measurements. Preferably, discrimination between the two signals is based on the two signals being separated by at least a frequency E defined as:, E = 2(frequency span/N) + K * RBW where: E = possible frequency error of a signal; frequency span = frequency range swept by a measuring receiver, for example, a, spectrum analyzer; N = number of points measured;, RBW = resolution bandwidth of a …

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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 April 27, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 27, 2010.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJune 21, 1989
GrantedApril 27, 1993
Term endedApril 27, 2010
Patent numberCA 1316983 C
Classification (IPC)G01R23/00 +2 more

Timeline

Timeline From CIPO dates

1990199319961999200220052008Application filedJune 21, 1989Patent grantedApril 27, 1993Term endedApril 27, 2010

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