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Expired Canadian patentCanada

Frame synchronizer for detecting misframes with different shift patterns

CA 1318981 C · Owner: Nec Corporation · Inventors: Yoshida, Norio

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Abstract From the Canadian patent

27-, "Frame Synchronizer for Detecting Misframes with Different Shift Patterns", ABSTRACT OF THE DISCLOSURE A frame synchronizer is adapted to receive an incoming high-speed TDM (time division multiplex) signal of a framed structure containing at, frame intervals, a sequence of identical synchronization bit patterns and a sequence of byte-length data signals. A demultiplexer decomposes the high speed TDM signal into the synchronization bit patterns and the byte-length data signals and supplies them as low-speed frames to output ports. A plurality of bit pattern detectors are provided for respectively detecting different bit patterns which are successively obtained from the decomposed …

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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

  • Granted June 8, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 8, 2010.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledAugust 11, 1989
GrantedJune 8, 1993
Term endedJune 8, 2010
Patent numberCA 1318981 C
Classification (IPC)H04J3/06

Timeline

Timeline From CIPO dates

1990199319961999200220052008Application filedAug 11, 1989Patent grantedJune 8, 1993Term endedJune 8, 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.