US PATENT SUBCLASS 33 / 302
.~.~ Borehole or tube interior study

Current as of: June, 1999
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33 /   HD   GEOMETRICAL INSTRUMENTS

300  DF  INDICATOR OF DIRECTION OF FORCE TRAVERSING NATURAL MEDIA {23}
301  DF  .~ Process {2}
302.~.~ Borehole or tube interior study

DEFINITION

Classification: 33/302

(under subclass 301) Process involving the study of the interior of a borehole or tube.

SEE OR SEARCH CLASS

73, Measuring and Testing,

152.01+, for borehole testing, per se, and subclass 152.57 for a borehole casing study, per se, wherein the test is not purely electrical or purely magnetic.

166, Wells,

250.01+, for processes there provided for including indicating testing, measuring, or locating.