US PATENT SUBCLASS 310 / 361
.~.~.~ Quartz

Current as of: June, 1999
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310 /   HD   ELECTRICAL GENERATOR OR MOTOR STRUCTURE

300  DF  NON-DYNAMOELECTRIC {4}
311  DF  .~ Piezoelectric elements and devices {17}
360  DF  .~.~ Rotation of crystal axis (e.g., cut angle) {2}
361.~.~.~ Quartz

DEFINITION

Classification: 310/361

Quartz:

(under subclass 360) Subject matter in which the piezoelectric material is crystalline silicon dioxide.