US PATENT SUBCLASS 324 / 524
.~.~.~ Polarity responsive

Current as of: June, 1999
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324 /   HD   ELECTRICITY: MEASURING AND TESTING

500  DF  FAULT DETECTING IN ELECTRIC CIRCUITS AND OF ELECTRIC COMPONENTS {10}
512  DF  .~ For fault location {10}
522  DF  .~.~ By voltage or current measuring {2}
524.~.~.~ Polarity responsive

DEFINITION

Classification: 324/524

Polarity responsive:

(under subclass 522) Subject matter where direction or distance to a fault is determined by a positive or negative signal.