US PATENT SUBCLASS 324 / 360
.~.~.~.~ Using a pulse-type current source

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.~.~.~.~ Using a pulse-type current source {2}
361  DF  .~.~.~.~.~> With mechanical current reversing means
362  DF  .~.~.~.~.~> To measure induced polarization

DEFINITION

Classification: 324/360

Using a pulse-type current source:

(under subclass 357) Subject matter wherein the current introduced into the subsurface has an abruptly changing waveform such as a pulse, step impulse, square wave, etc.

(1) Note. The introduced current may include a single pulse-type signal or a plurality of such signals.