US PATENT SUBCLASS 84 / 730
.~.~.~ Piezoelectric

Current as of: June, 1999
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84 /   HD   MUSIC

1  DF  INSTRUMENTS {9}
600  DF  .~ Electrical musical tone generation {5}
723  DF  .~.~ Transducers {9}
730.~.~.~ Piezoelectric {2}
731  DF  .~.~.~.~> String
732  DF  .~.~.~.~> Reed

DEFINITION

Classification: 84/730

Piezoelectric:

(under subclass 723) Subject matter wherein a varying mechanically stressed crystal causes a varying current or voltage.

SEE OR SEARCH CLASS

29, Metal Working,

29.35, for methods of making a piezoelectric device.

310, Electrical Generator or Motor Structure,

311+, for piezoelectric elements and devices.

381, Electrical Audio Signal Processing Systems and Devices,

114, for piezoelectric microphone.