US PATENT SUBCLASS 33 / 365
.~ Level or plumb, terrestrial gravitation responsive

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.~ Level or plumb, terrestrial gravitation responsive {9}
366.11  DF  .~.~> Electrically actuated signal or indicator {9}
367  DF  .~.~> Plural, similar, separable liquid columns system
368  DF  .~.~> Arresting means for movable indicator
369  DF  .~.~> Line level type
370  DF  .~.~> Work, or workman, attaching means {1}
374  DF  .~.~> Relatively movable, coacting, reference-surface sections {1}
376  DF  .~.~> Add-on-type reference-surface section
377  DF  .~.~> Liquid type, upper surface utilizing {2}
391  DF  .~.~> Pendulum {8}

DEFINITION

Classification: 33/365

(under subclass 300) Device responsive to terrestrial gravitation and establishing either a horizontal or a vertical direction.

SEE OR SEARCH THIS CLASS, SUBCLASS:

401, for a magnetic output coupling for a nonelectrical pendulum type level.