US PATENT SUBCLASS 33 / 374
.~.~ Relatively movable, coacting, reference-surface sections

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}
374.~.~ Relatively movable, coacting, reference-surface sections {1}
375  DF  .~.~.~> Affecting level or plumb indication

DEFINITION

Classification: 33/374

(under subclass 365) Device including a plurality or relatively moveable members, each having a surface adapted for simultaneous contact with a workpiece, and which surfaces together determine that direction of the workpiece which is to be related to the level or plumb.