US PATENT SUBCLASS 367 / 179
.~.~ Pendulum type


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367 /   HD   COMMUNICATIONS, ELECTRICAL: ACOUSTIC WAVE SYSTEMS AND DEVICES

140  DF  SIGNAL TRANSDUCERS {4}
178  DF  .~ Receivers {6}
179.~.~ Pendulum type


DEFINITION

Classification: 367/179

Pendulum type:

(under subclass 178) Subject matter wherein a body suspended from a fixed point swings in an arcuate manner in response to incident acoustic wave energy.