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Expired Canadian patentCanada

Packet multiplexer with automatic communication path optimization based on loop detection

CA 2274395 C · Owner: Miyakawa, Shin · Inventors: Ono, Satoshi; Terao, Kazuyuki; Miyakawa, Shin

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 packet multiplexer capable of realizing the optimization of a communication path automatically without, requiring a user to explicitly specify for it is, disclosed. The packet multiplexer is formed by a plurality of first communication interfaces for terminating a plurality of C-plane and U-plane pairs on one side of the packet multiplexer, a second communication interface for terminating a single C-plane and a plurality of U-planes on another side of the packet multiplexer a connection, interface for multiplexing the C-plane and U-plane pairs terminated at the first communication interfaces into the single C-plane and the plurality of U-planes terminated at the second communication …

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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

  • Filed June 11, 1999 and granted October 29, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 11, 2019.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 11, 2021.
  • 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 11, 1999
GrantedOctober 29, 2002
Term endedJune 11, 2019
Patent numberCA 2274395 C
Classification (IPC)H04Q11/00 +2 more

Timeline

Timeline From CIPO dates

2000200220042006200820102012201420162018Application filedJune 11, 1999Patent grantedOct 29, 2002Term endedJune 11, 2019

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