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Expired Canadian patentCanada

Method and apparatus for controlling quality of service in an atm network

CA 2276381 C · Owner: Motorola, Inc. · Inventors: Grossman, Daniel B.

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

A switching node (15, 16, 17 or 20) for an ATM network (10) can selectively implement one of a plurality of call transforming procedures. The switching node (15, 16, 17, or 20) stores characteristics of each connected communications link (22 or 24) in a virtual connection and determines for any , ATM message the quality of service requirements for a particular transfer over a virtual connection. The selection of a call transferring process is based upon minimizing a particular potential error. Decisions concerning the implementation of correction procedures and the capability of the virtual connection to accommodate these requirements are made on a link-by-link basis.

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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 November 6, 1997 and granted January 14, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 6, 2017.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 6, 2019.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledNovember 6, 1997
GrantedJanuary 14, 2003
Term endedNovember 6, 2017
Patent numberCA 2276381 C
Classification (IPC)H04J3/14

Timeline

Timeline From CIPO dates

1998200020022004200620082010201220142016Application filedNov 6, 1997Patent grantedJan 14, 2003Term endedNov 6, 2017

Sources & verification

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