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Expired Canadian patentCanada

Method of determining an acoustic refractive index distribution in an examination zone, and device for performing the method

CA 1262959 C · Owner: Mckinnon, Graeme-Colin · Inventors: Mckinnon, Graeme-Colin

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Abstract From the Canadian patent

18, PHD 85013 1.1.1986, ABSTRACT:, Method of determining an acoustic refractive index distribution in an examination zone, and device for performing the method. The invention relates to a method of determining the internal structure of the body by means of ultrasound beams, and a device for performing this method. The usually non-rectilinear paths followed by the ultrasound beam through the body are thus very effectively calculated.

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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

  • Granted November 14, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 14, 2006.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledFebruary 12, 1986
GrantedNovember 14, 1989
Term endedNovember 14, 2006
Patent numberCA 1262959 C
Classification (IPC)G01N29/00 +2 more

Timeline

Timeline From CIPO dates

1987198919911993199519971999200120032005Application filedFeb 12, 1986Patent grantedNov 14, 1989Term endedNov 14, 2006

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