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Expired Canadian patentCanada

Dipole parameter estimation method and apparatus

CA 2123563 C · Owner: Kamijo, Ken'Ichi · Inventors: Kiyuna, Tomoharu; Kamijo, Ken'Ichi; Tanigawa, Tetsuji

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Abstract From the Canadian patent

A trained neural network is used for estimating the number, positions or moments of one of more dipoles which are assumed as sources of the electromagnetic field distribution based upon an electromagnetic field distribution of a living body or an object. At least either one of the dipole number positions and moments, or more than two of their combination is referred to as dipole parameters.

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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 May 13, 1994 and granted December 30, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 13, 2014.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 13, 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.
FiledMay 13, 1994
GrantedDecember 30, 1997
Term endedMay 13, 2014
Patent numberCA 2123563 C
Classification (IPC)G01R29/08 +2 more

Timeline

Timeline From CIPO dates

1995199719992001200320052007200920112013Application filedMay 13, 1994Patent grantedDec 30, 1997Term endedMay 13, 2014

Sources & verification

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