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Expired Canadian patentCanada

Systems and methods for multiplexing control data for multiple data channels onto a single control channel

CA 2540833 C · Owner: Malladi, Durga Prasad · Inventors: Malladi, Durga Prasad; Zhang, Xiaoxia; Willenegger, Serge D.

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Abstract From the Canadian patent

Systems and methods for communicating control data for multiple data channels using a single control channel. In one embodiment a method is implemented in , a WCDMA communications system. This method includes combining data rate information for a first data channel and data rate information for a second data channel in a mobile station, encoding the combined data rate information and transmitting the encoded combined data rate information from the mobile station to a base station via a single control channel. This method further includes receiving the encoded combined data rate information in the base station, decoding the encoded combined data rate information to produce 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 October 1, 2004 and granted November 26, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 1, 2024.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 1, 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.
FiledOctober 1, 2004
GrantedNovember 26, 2013
Term endedOctober 1, 2024
Patent numberCA 2540833 C
Classification (IPC)—

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Timeline From CIPO dates

2005200720092011201320152017201920212023Application filedOct 1, 2004Patent grantedNov 26, 2013Term endedOct 1, 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.