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Expired Canadian patentCanada

Method and apparatus for mitigating the effects of interference in a wireless communication system

CA 2228899 C · Owner: Rozanski, Walter Joseph, Jr. · Inventors: Rozanski, Walter Joseph, Jr.; Reed, John Douglas

CIPO record

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Abstract From the Canadian patent

A wireless communication system (200) estimates (303) the location of a mobile station (215) when a degradation in the mobile station's communication occurs due to interference, and stores (305) the location estimate in a database. The database is used to determine the potential for the mobile station (215) within the wireless communication system to receive interference based on its estimated location or its proximity to the known interference location. When the mobile station (215) is within a predetermined distance of the known interference location, the likelihood for the mobile station (215) to experience a degradation in call quality duration, etc. increases. To , migitate 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 March 10, 1997 and granted October 9, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 10, 2017.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 10, 2019.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMarch 10, 1997
GrantedOctober 9, 2001
Term endedMarch 10, 2017
Patent numberCA 2228899 C
Classification (IPC)H04J13/00 +2 more

Timeline

Timeline From CIPO dates

1998200020022004200620082010201220142016Application filedMarch 10, 1997Patent grantedOct 9, 2001Term endedMarch 10, 2017

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