US PATENT SUBCLASS 600 / 523
.~.~.~.~ Signal display or recording

Current as of: June, 1999
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600 /   HD   SURGERY

300  DF  DIAGNOSTIC TESTING {38}
481  DF  .~ Cardiovascular {6}
508  DF  .~.~ Heart {4}
509  DF  .~.~.~ Detecting heartbeat electric signal {10}
523.~.~.~.~ Signal display or recording {2}
524  DF  .~.~.~.~.~> Magnetic recording
525  DF  .~.~.~.~.~> Cathode-ray tube used for display or included in recording means

DEFINITION

Classification: 600/523

Signal display or recording:

(under subclass 509) Subject matter for indicating or registering the heartbeat electric signal.

SEE OR SEARCH CLASS

346, Recorders,

33, for recorders.