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Expired Canadian patentCanada

Ultrasonic doppler diagnostic apparatus

CA 1262958 C · Owner: Namekawa, Kouroku · Inventors: Namekawa, Kouroku

CIPO record

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

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Abstract From the Canadian patent

An ultrasonic Doppler diagnostic apparatus usable for ultrasonic image diagnostics accurately determines and displays the velocity of moving reflective members within a subject under observation by transmitting an ultrasonic beam into the subject and receiving the echoes reflected by the moving reflective members. The apparatus comprises a memory for storing a first velocity distribution obtained from a first signal received from a given direction and a, tangential velocity calculator for calculating a tangential velocity distribution in a direction tangential to an arc of a scanned sector by comparing said first velocity distribution with a second velocity distribution obtained from a …

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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.
FiledDecember 22, 1986
GrantedNovember 14, 1989
Term endedNovember 14, 2006
Patent numberCA 1262958 C
Classification (IPC)G01S15/58 +1 more

Timeline

Timeline From CIPO dates

1987198919911993199519971999200120032005Application filedDec 22, 1986Patent grantedNov 14, 1989Term endedNov 14, 2006

Sources & verification

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