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Expired Canadian patentCanada

Method and apparatus for establishing frame synchronization

CA 1184325 A · Owner: Jacobsen, Christian C. · Inventors: Profet, Gary A.; Hampton, Dean A.; Jacobsen, Christian C.

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Abstract From the Canadian patent

Abstract, A synchronization technique in which the frame used for synchronization is different from that used for normal data communication and contains few if any bits other than those used to establish synchronization. At the beginning of data communication the synchronization, frame is stored in one of a pair of memories and this frame is read out of the memory onto a communication channel between the local and remote stations. At the same time, the other memory is used to store the frame that is normally used for data communication. When synchronization is established between the local and remote stations, signal generation shifts from the first memory to the second; and the second …

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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 March 19, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 19, 2002.
  • 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 11, 1982
GrantedMarch 19, 1985
Term endedMarch 19, 2002
Patent numberCA 1184325 A
Classification (IPC)H04J3/06 +1 more

Timeline

Timeline From CIPO dates

1983198519871989199119931995199719992001Application filedJan 11, 1982Patent grantedMarch 19, 1985Term endedMarch 19, 2002

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