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Expired Canadian patentCanada

System and method for specifying measurement request start time

CA 2525054 C · Owner: Mangold, Stefan · Inventors: Zhong, Zhun; Soomro, Amjad; Mangold, Stefan

CIPO record

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Abstract From the Canadian patent

The present invention relates to specification of the start time for taking measurements in wireless local area networks (WLAN) in which the start time , of measurements to be taken is included in a Measurement Start Time field of a Measurement Request Frame and the interpretation of the start time for a specific measured element is determined by a Mode field included in each Measurement Request Element field of the Measurement Request Frame. Optionally, the start time of a Measurement Request Frame is specified using a time synchronization function (TSF) timer value or part thereof in order to avoid ambiguities in interpretation of the start time reported.

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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 May 3, 2004 and granted April 22, 2014. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 3, 2024.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 3, 2026.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMay 3, 2004
GrantedApril 22, 2014
Term endedMay 3, 2024
Patent numberCA 2525054 C
Classification (IPC)H04W24/10 +1 more

Timeline

Timeline From CIPO dates

2005200720092011201320152017201920212023Application filedMay 3, 2004Patent grantedApril 22, 2014Term endedMay 3, 2024

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