US PATENT SUBCLASS 33 / 367
.~.~ Plural, similar, separable liquid columns system

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}
367.~.~ Plural, similar, separable liquid columns system

DEFINITION

Classification: 33/367

(under subclass 365) Device including separable, independently movable liquid containers interconnected by a liquid conductor, the upper surfaces of the liquid in the containers establishing a horizontal direction.

SEE OR SEARCH THIS CLASS, SUBCLASS:

377+, for other liquid levels utilizing the upper surface of the liquid.