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Expired Canadian patentCanada

Process for coupling and uncoupling signals into and out of the sub-areas of supplementary signals of transport modules of a synchronous digital signal hierarchy

CA 1331639 C · Owner: Siemens Aktiengesellschaft · Inventors: Musil, Gerhard; Fiedler, Udo; Weimert, Gunter

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Abstract From the Canadian patent

The present invention relates to a process for uncoupling signals from at least one sub-area of the supplementary signals and to couple signals into at least one sub-area of the supplementary signals of transport modules of a synchronous digital signal hierarchy as in CCITT Draft Recommendations G.70X G.70Y, and G.70Z. When uncoupling, this task has been solved in that a sub-area of the secondary signals is uncoupled from the transport module in a demultiplexing and spreading system and, during a period of time is spread within the framework. The spread signal is broken down, for example into the secondary, signals of the selected sub-area that are associated with the transport modules of …

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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 August 23, 1994. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 23, 2011.
  • 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 2, 1989
GrantedAugust 23, 1994
Term endedAugust 23, 2011
Patent numberCA 1331639 C
Classification (IPC)H04L5/22 +1 more

Timeline

Timeline From CIPO dates

19901993199619992002200520082011Application filedJune 2, 1989Patent grantedAug 23, 1994Term endedAug 23, 2011

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