US PATENT SUBCLASS 33 / 351
.~ Diverse directional indicator

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

300  DF  INDICATOR OF DIRECTION OF FORCE TRAVERSING NATURAL MEDIA {23}
351.~ Diverse directional indicator {2}
352  DF  .~.~> Includes magnetic compass
353  DF  .~.~> Line plumb and bubble level

DEFINITION

Classification: 33/351

(under subclass 300) Device provided with (1) two different types of directional indicators, or (2) two different kinds of the same type, e.g., bubble and float.

SEE OR SEARCH THIS CLASS, SUBCLASS:

313, for means for indicating the inclination and direction of boreholes.

322, for diverse indicators controlled by plural gyroscopes.