US PATENT SUBCLASS 324 / 370
.~.~.~.~.~ Using surface current electrodes

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}
366  DF  .~.~.~.~ For well logging {7}
370.~.~.~.~.~ Using surface current electrodes

DEFINITION

Classification: 324/370

Using surface current electrodes:

(under subclass 366) Subject matter in which potentials detected along the borehole are created by current flowing between electrodes located at the earth's surface on opposite sides of the borehole.