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Expired Canadian patentCanada

Method and apparatus for communicating interleaved data

CA 2098772 C · Owner: Paik, Woo H. · Inventors: Lery, Scott A.; Fox, John M.; Paik, Woo H.

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Abstract From the Canadian patent

An interleaves (34) processes information in a pseudorandom order to provide pseudorandom interleaved data for communication to a deinterleaver (42). The pseudorandom interleaved data is processed at the deinterleaver (42) in a pseudorandom order corresponding to that used at the interleaves (34) means, to recover the original information. The pseudorandom processing at the deinterleaver is synchronized with the pseudorandom processing at the interleaves on a trial and error basis. In one embodiment, full synchronization occurs when a Viterbi decoder (44) receiving data from the deinterleaver has a renormalization rate within a designated threshold and when enough synchronization words are …

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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 June 18, 1993 and granted August 31, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 18, 2013.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 18, 2015.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJune 18, 1993
GrantedAugust 31, 1999
Term endedJune 18, 2013
Patent numberCA 2098772 C
Classification (IPC)H04L9/12 +2 more

Timeline

Timeline From CIPO dates

1994199619982000200220042006200820102012Application filedJune 18, 1993Patent grantedAug 31, 1999Term endedJune 18, 2013

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