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Expired Canadian patentCanada

Packet switching network

CA 1297564 C · Owner: De Somer, Michel Philemon Madeleine · Inventors: De Prycker, Martin Louis Florence; De Somer, Michel Philemon Madeleine

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

Packet switching network with first (DN) and second (RN) cascaded pares including first and second switching modules respectively. In the second switching modules the path selection is controlled by routing information contained in the packets. In the first switching modules this selection is performed without using routing information only for a path set up packet whilst for, the following packets use is made of routing information on the route followed by the path set up packet. Each module decides to multiplex an input stream on an output only when a calculated traffic load is smaller than a limit value. This load is calculated from traffic load parameters contained in the path set up …

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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 17, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 17, 2009.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledDecember 18, 1987
GrantedMarch 17, 1992
Term endedMarch 17, 2009
Patent numberCA 1297564 C
Classification (IPC)H04L12/56

Timeline

Timeline From CIPO dates

19881991199419972000200320062009Application filedDec 18, 1987Patent grantedMarch 17, 1992Term endedMarch 17, 2009

Sources & verification

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