US PATENT SUBCLASS 600 / 455
.~.~.~.~.~ Pulse Doppler

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  DF  .~.~.~.~ Blood flow studies {2}
455.~.~.~.~.~ Pulse Doppler {1}
456  DF  .~.~.~.~.~.~> With volumetric measurement

DEFINITION

Classification: 600/455

Pulse Doppler:

(under subclass 454) Subject matter wherein the ultrasonic wave emitted from the scanning means is characterized by a momentary fluctuation in an electrical quantity, as in voltage or current, applied to the scanning means.