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Expired Canadian patentCanada

Method and apparatus for generating control information for packet data

CA 2446686 C · Owner: Puig Oses, David · Inventors: Odenwalder, Joseph P.; Tiedemann, Edward G. Jr.; Wei, Yongbin

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

Systems and techniques for communications wherein a data packet is transmitted over at least one time slot from a transmission site a value is computed from , an initial value and information the initial value being a function of the number of time slots of the data packet transmission the value and the , information is transmitted from the transmission site the transmitted value , and the information is received at a receiving site the value from the , received information is recalculated and the number of time slots of the data packet transmission is determined from the calculated and recalculated values. It is emphasized that this abstract is provided to comply with the rules …

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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 7, 2002 and granted October 16, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 7, 2022.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 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.
FiledMay 7, 2002
GrantedOctober 16, 2012
Term endedMay 7, 2022
Patent numberCA 2446686 C
Classification (IPC)H04W80/02 +1 more

Timeline

Timeline From CIPO dates

2003200520072009201120132015201720192021Application filedMay 7, 2002Patent grantedOct 16, 2012Term endedMay 7, 2022

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