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Expired Canadian patentCanada

Channel utilization method and system for isdn

CA 2109632 C · Owner: Hsu, Meichum · Inventors: Ko, Cheng-Hsu; Hsu, Meichum; Gagliardi, Ugo O.

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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

An ISDN gateway (GW, 100) dynamically allocates bandwidth by monitoring traffic at each destination queue and in response allocating or deallocating virtual B-channels. A long term allocation (LTA) algorithm is executed during usual traffic conditions to determine when, and for how long virtual B-channels are to be , allocated. During transient conditions the gateway, (GW, 100) executes a short term allocation (STA) algorithm. Bandwidth utilization is optimized by packaging data packets into trains that are transmitted to the destination when the train is complete and upon satisfaction of other conditions. Each train undergoes data compression by execution of a suitable compression …

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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 May 24, 1991 and granted April 25, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 24, 2011.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 24, 2013.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMay 24, 1991
GrantedApril 25, 2000
Term endedMay 24, 2011
Patent numberCA 2109632 C
Classification (IPC)H04L12/91 +1 more

Timeline

Timeline From CIPO dates

1992199419961998200020022004200620082010Application filedMay 24, 1991Patent grantedApril 25, 2000Term endedMay 24, 2011

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