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Expired Canadian patentCanada

Apparatus and method for a virtual hierarchial local area network

CA 2493383 C · Owner: Mancour, Timothy · Inventors: Mancour, Timothy; Sodder, Arnold; Didiodato, Louis

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Abstract From the Canadian patent

A method and apparatus are provided for creating a virtual hierarchical local area network. A hierarchical framing technique allows a network architecture to realize a local area network hierarchy within the network. In this manner a first local area network hierarchy is defined by communication in a first frame format (24) between a first set of network devices and a second set of network devices. A second local area network hierarchy is defined by communication in a second frame format (48) between members of the second set of network devices. The second frame format includes the fields of a frame in the first frame format that is used to communicate between the first set of …

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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 July 16, 2003 and granted July 10, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 16, 2023.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 16, 2025.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJuly 16, 2003
GrantedJuly 10, 2012
Term endedJuly 16, 2023
Patent numberCA 2493383 C
Classification (IPC)H04L12/28 +1 more

Timeline

Timeline From CIPO dates

2004200620082010201220142016201820202022Application filedJuly 16, 2003Patent grantedJuly 10, 2012Term endedJuly 16, 2023

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