US PATENT SUBCLASS 600 / 454
.~.~.~.~ Blood flow studies

Current as of: June, 1999
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600 /   HD   SURGERY

300  DF  DIAGNOSTIC TESTING {38}
407  DF  .~ Detecting nuclear, electromagnetic, or ultrasonic radiation {11}
437  DF  .~.~ Ultrasonic {10}
453  DF  .~.~.~ Doppler effect (e.g., fetal HR monitoring) {1}
454.~.~.~.~ Blood flow studies {2}
455  DF  .~.~.~.~.~> Pulse Doppler {1}
457  DF  .~.~.~.~.~> CW Doppler

DEFINITION

Classification: 600/454

Blood flow studies:

(under subclass 453) Subject matter wherein the Doppler shift is utilized to analyze blood flow rate or volume.