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Expired Canadian patentCanada

Parallel sync detection

CA 2015973 C · Owner: Newby, Paul Scott · Inventors: Cannon, Wayne Harry; Newby, Paul Scott

CIPO record

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Abstract From the Canadian patent

A parallel sync detection circuit comprising a serial-to-parallel converter for converting an input serial signal into a corresponding parallel signal a, phase detector for detecting possible phase of a sync word in the parallel signal and generating a phase signal responsive thereto, a sync word generator for receiving the phase signal and in response generating a phase shifted stored version of the sync word and a, correlator for comparing the parallel signal to the phase shifted stored version of the sync word and in the event of substantial identity therebetween generating an output signal for indicating detection of the sync word.

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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 2, 1990 and granted June 23, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 2, 2010.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 2, 2012.
  • 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 2, 1990
GrantedJune 23, 1998
Term endedMay 2, 2010
Patent numberCA 2015973 C
Classification (IPC)H04L7/00

Timeline

Timeline From CIPO dates

1991199319951997199920012003200520072009Application filedMay 2, 1990Patent grantedJune 23, 1998Term endedMay 2, 2010

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