US PATENT SUBCLASS 367 / 180
.~.~ Piezoelectric

Current as of: June, 1999
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367 /   HD   COMMUNICATIONS, ELECTRICAL: ACOUSTIC WAVE SYSTEMS AND DEVICES

140  DF  SIGNAL TRANSDUCERS {4}
178  DF  .~ Receivers {6}
180.~.~ Piezoelectric

DEFINITION

Classification: 367/180

Piezoelectric:

(under subclass 178) Subject matter wherein acoustic wave energy is converted into electrical energy by a material which exhibits an electrostatic polarization when subjected to mechanical stress.