US PATENT SUBCLASS 33 / 378
.~.~.~ Float or piston

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

300  DF  INDICATOR OF DIRECTION OF FORCE TRAVERSING NATURAL MEDIA {23}
365  DF  .~ Level or plumb, terrestrial gravitation responsive {9}
377  DF  .~.~ Liquid type, upper surface utilizing {2}
378.~.~.~ Float or piston

DEFINITION

Classification: 33/378

(under subclass 377) Device wherein an element is supported by the liquid, the element serving to indicate or to control an indicator.

SEE OR SEARCH THIS CLASS, SUBCLASS:

396, for a level or plumb indicator of the pendulum type wherein the pendulum is wholly or partially supported by liquid.