US PATENT SUBCLASS 324 / 361
.~.~.~.~.~ With mechanical current reversing means


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

323  DF  OF GEOPHYSICAL SURFACE OR SUBSURFACE IN SITU {7}
347  DF  .~ Using electrode arrays, circuits, structure, or supports {2}
354  DF  .~.~ Coupled to artificial current source {2}
357  DF  .~.~.~ Including separate pickup of generated fields or potentials {6}
360  DF  .~.~.~.~ Using a pulse-type current source {2}
361.~.~.~.~.~ With mechanical current reversing means


DEFINITION

Classification: 324/361

With mechanical current reversing means:

(under subclass 360) Subject matter in which the current is caused to reverse direction by mechanical switching apparatus.