US PATENT SUBCLASS 324 / 331
.~.~ For magnetic field detection

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}
330  DF  .~ By aerial survey {1}
331.~.~ For magnetic field detection

DEFINITION

Classification: 324/331

For magnetic field detection:

(under subclass 330) Subject matter having means for detecting a component of the earth's magnetic field.

SEE OR SEARCH THIS CLASS, SUBCLASS:

345, for magnetic prospecting means in general.