US PATENT SUBCLASS 324 / 357
.~.~.~ Including separate pickup of generated fields or potentials

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


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.~.~.~ Including separate pickup of generated fields or potentials {6}
358  DF  .~.~.~.~> With three electrodes
359  DF  .~.~.~.~> With nonelectrode pickup means
360  DF  .~.~.~.~> Using a pulse-type current source {2}
363  DF  .~.~.~.~> By varying the path of current flow {1}
365  DF  .~.~.~.~> Offshore
366  DF  .~.~.~.~> For well logging {7}

DEFINITION

Classification: 324/357

Including separate pickup of generated fields or potentials:

(under subclass 354) Subject matter having means distinct from the current introduction means, for detecting the fields or potentials resulting from the current which has been caused to flow into the subsurface.

SEE OR SEARCH THIS CLASS, SUBCLASS:

64, for the detection of potentials caused by current flow in conducting resistance measurements in general.