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Expired Canadian patentCanada

Distributed voice-data switching on multi-stage interconnection networks

CA 1264081 C · Owner: Kumar, Manoj · Inventors: Lien, Yeong-Chang L.; Dias, Daniel M.; Maruyama, Kiyoshi

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

Abstract, A method of switching synchronous and asynchronous data packets through a multi-stage interconnection network (MIN), so as to insure that packets with the highest assignable priority level will never be blocked at any stage of the network. More specifically, this invention relates to a method of switching voice and data packets over the MIN wherein each of the address bits in each packet determine the connection to be established at each particular stage in the network and wherein each packet has therein a priority level. In each time slot of a frame, the priority level of the packets stored in a particular originating adapter are compared and the packet with the highest priority …

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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 December 27, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 27, 2006.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMarch 11, 1987
GrantedDecember 27, 1989
Term endedDecember 27, 2006
Patent numberCA 1264081 C
Classification (IPC)H04Q3/42 +1 more

Timeline

Timeline From CIPO dates

1988199019921994199619982000200220042006Application filedMarch 11, 1987Patent grantedDec 27, 1989Term endedDec 27, 2006

Sources & verification

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