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Expired Canadian patentCanada

Method and system for routing path determination for mobile workstations in a multisegment local area network

CA 2130409 C · Owner: International Business Machines Corporation · Inventors: Wu, David C.; Van Duren, Richard George; Moore, Victor S.

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Abstract From the Canadian patent

A method and system for maintaining a routing path between a selected workstation within a multisegment local area network and a mobile workstation wherein individual segments within the multisegment local area network are interconnected by a router device and wherein selected segments within the multisegment local area network include radio frequency transceivers adapted to provide a wireless communications link with mobile workstations. Each time communication is established between a mobile workstation and a selected workstation within the multisegment local area network via a radio frequency transceiver a routing table entry is established which identifies a segment location for the …

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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 August 18, 1994 and granted June 22, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 18, 2014.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 18, 2016.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledAugust 18, 1994
GrantedJune 22, 1999
Term endedAugust 18, 2014
Patent numberCA 2130409 C
Classification (IPC)H04L12/28 +2 more

Timeline

Timeline From CIPO dates

1995199719992001200320052007200920112013Application filedAug 18, 1994Patent grantedJune 22, 1999Term endedAug 18, 2014

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