US PATENT SUBCLASS 324 / 372
.~.~.~.~.~ Between spaced boreholes

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}
372.~.~.~.~.~ Between spaced boreholes

DEFINITION

Classification: 324/372

Between spaced boreholes:

(under subclass 366) Subject matter in which electrode means are lowered within two or more drill holes in the earth for investigating the formations between the boreholes.