US PATENT SUBCLASS 73 / 649
.~ Sensing apparatus

Current as of: June, 1999
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73 /   HD   MEASURING AND TESTING

570  DF  VIBRATION {10}
649.~ Sensing apparatus {5}
650  DF  .~.~> Torsional
651  DF  .~.~> Vibratable reed
652  DF  .~.~> With inertia element {2}
655  DF  .~.~> With light beam indicator {2}
658  DF  .~.~> With electrically controlled indicator {3}

DEFINITION

Classification: 73/649

Sensing apparatus:

(under subclass 570) Subject matter comprising means for rendering perceptible, indicating, or recording such vibrations or analysis thereof.

SEE OR SEARCH THIS CLASS, SUBCLASS:

591, for sound tubes.

SEE OR SEARCH CLASS

181, Acoustics,

131, for stethoscopes.

310, Electrical Generator or Motor Structure, 334+, for piezoelectric devices.