US PATENT SUBCLASS 33 / 331
.~ With recorder

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

300  DF  INDICATOR OF DIRECTION OF FORCE TRAVERSING NATURAL MEDIA {23}
331.~ With recorder

DEFINITION

Classification: 33/331

(under subclass 300) Device having means for making a discrete record of the sensed direction.

SEE OR SEARCH THIS CLASS, SUBCLASS:

304+, for borehole direction or inclination indicators, many of which include a recorder.