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Expired Canadian patentCanada

Switching matrix network

CA 1207415 A · Owner: Siemens Aktiengesellschaft · Inventors: Rehm, Hans; Donig, Gunter

CIPO record

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Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

For switching or respectively, distributing broadband communication signals in message switching systems, broadband switching matrix networks having crosspoint circuits realized in an ECL technology and which are formed by controllable multiplexers is provided. The controllable multiplexers are mutually interconnected to form multistage crosspoint pyramids respectively exhibiting an outgoing line and a plurality of incoming lines whereby the, controllable multiplexers of a respective plurality of crosspoint pyramids are combined on a chip module. The chip module may be a master slice module. An additional transfer crosspoint in the form of a 2-bit multiplexer can be provided at the tip 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 July 8, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 8, 2003.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledFebruary 11, 1983
GrantedJuly 8, 1986
Term endedJuly 8, 2003
Patent numberCA 1207415 A
Classification (IPC)H04Q11/04 +2 more

Timeline

Timeline From CIPO dates

1984198619881990199219941996199820002002Application filedFeb 11, 1983Patent grantedJuly 8, 1986Term endedJuly 8, 2003

Sources & verification

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