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Expired Canadian patentCanada

Apparatus for and method of analyzing coupling characteristics

CA 2020144 C · Owner: Mitsubishi Denki Kabushiki Kaisha · Inventors: Yokota, Yuko

CIPO record

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Abstract From the Canadian patent

Characteristics of a coupled system which consists of a, plurality of unit structures coupled together are analyzed, accurately and quickly by providing between calculating, means for calculating transfer function matrices concerning unit structures and coupling means for coupling togethe transfer function matrices according to definitions of coupling, co-ordinate conversion means for converting transfer function matrices into those in the overall system.

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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 June 29, 1990 and granted March 15, 1994. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 29, 2010.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 29, 2012.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJune 29, 1990
GrantedMarch 15, 1994
Term endedJune 29, 2010
Patent numberCA 2020144 C
Classification (IPC)G06F17/50

Timeline

Timeline From CIPO dates

1991199319951997199920012003200520072009Application filedJune 29, 1990Patent grantedMarch 15, 1994Term endedJune 29, 2010

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