US PATENT SUBCLASS 33 / 283
.~.~ Having gravity responsive indicating means (e.g., pendulum, etc.)

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

227  DF  STRAIGHT-LINE LIGHT RAY TYPE {20}
282  DF  .~ Vertical angle {2}
283.~.~ Having gravity responsive indicating means (e.g., pendulum, etc.)

DEFINITION

Classification: 33/283

(under subclass 282) Device wherein the magnitude of the angle is measured by means of a gravity actuated or pendulous indicating means.