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Expired Canadian patentCanada

Hybrid arq schemes with soft combining in variable rate packet data applications

CA 2397893 C · Owner: Nortel Networks Limited · Inventors: Tong, Wen; Strawczynski, Leo L.; Periyalwar, Shalini S.

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Abstract From the Canadian patent

A system and method for transmitting high speed data on fixed rate and for variable rate channels. The system and method provides the flexibility of adjusting the data rate, the coding rate and the nature of individual , retransmissions. Further the system and method supports partial soft combining of retransmitted data with previously transmitted data supports , parity bit selection for succesive retransmissions and supports various , combinations of data rate variations coding rate variations, and partial data transmissions.

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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 January 18, 2001 and granted May 3, 2011. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 18, 2021.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 18, 2023.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJanuary 18, 2001
GrantedMay 3, 2011
Term endedJanuary 18, 2021
Patent numberCA 2397893 C
Classification (IPC)H04L1/18 +1 more

Timeline

Timeline From CIPO dates

2002200420062008201020122014201620182020Application filedJan 18, 2001Patent grantedMay 3, 2011Term endedJan 18, 2021

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