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Expired Canadian patentCanada

Crossbar/hub arrangement for multimedia network

CA 2238280 C · Owner: Humpleman, Richard · Inventors: Humpleman, Richard

CIPO record

Overview

Drawings and full text

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

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Abstract From the Canadian patent

A home network architecture has an internal digital network interconnecting devices in the home. Entertainment services are introduced into the network through network interface units that are coupled to an external network and to the internal network. The network interface units are selectively directly connected by a direct circuit crossbar to set-top electronics so that video data, for example, may be directly provided from a network interface unit to the set-top electronics without jitter. A passive hub which does not have , packet routing capability is then used to provide signal regeneration and retransmission of other data over the network.

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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 21, 1996 and granted May 6, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 21, 2016.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 21, 2018.
  • 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 21, 1996
GrantedMay 6, 2003
Term endedNovember 21, 2016
Patent numberCA 2238280 C
Classification (IPC)H04L12/12 +2 more

Timeline

Timeline From CIPO dates

1997199920012003200520072009201120132015Application filedNov 21, 1996Patent grantedMay 6, 2003Term endedNov 21, 2016

Sources & verification

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