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Expired Canadian patentCanada

Node for a fast packet-switching network in optical-electrical technology

CA 1331047 C · Owner: Cselt - Centro Studi E Laboratori Telecommunicazioni S.P.A. · Inventors: De Bosio, Alfredo

CIPO record

Overview

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

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Abstract From the Canadian patent

A node for a fast packet-switching network in hybrid optical-electrical technology has an optical switching matrix and an electrical control portion which processes signal packets and the headers of information packets. The control portion updates the label of information packets held in an optical buffer and, depending on such a label searches for, a routing through the node. A centralized node controller processes the signal packets, while a distributed input processing system processes the information packet headers and routes the packets through the network. For all communications in progress, the distributed input processing system periodically forwards routing requests towards an …

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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 26, 1994. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 26, 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.
FiledFebruary 28, 1989
GrantedJuly 26, 1994
Term endedJuly 26, 2011
Patent numberCA 1331047 C
Classification (IPC)H04L12/56 +1 more

Timeline

Timeline From CIPO dates

19901993199619992002200520082011Application filedFeb 28, 1989Patent grantedJuly 26, 1994Term endedJuly 26, 2011

Sources & verification

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