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Expired Canadian patentCanada

Frequency assignment for multi-cell ieee 802.11 wireless networks

CA 2411330 C · Owner: At&T Corp. · Inventors: Leung, Kin K.; Kim, Byoung-Jo J.

CIPO record

Overview

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

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Abstract From the Canadian patent

A frequency planning method for use in an IEEE 802.1 l wireless network is described. The frequency planning method obtains traffic load information associated with access points belonging to a multi-cell wireless network and assigns channels to the access points based on the traffic load information.

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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 November 7, 2002 and granted February 1, 2011. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 7, 2022.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 7, 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.
FiledNovember 7, 2002
GrantedFebruary 1, 2011
Term endedNovember 7, 2022
Patent numberCA 2411330 C
Classification (IPC)H04W28/08 +2 more

Timeline

Timeline From CIPO dates

2003200520072009201120132015201720192021Application filedNov 7, 2002Patent grantedFeb 1, 2011Term endedNov 7, 2022

Sources & verification

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