US PATENT SUBCLASS 219 / 210
.~.~.~ Crystal or other vibratory device

Current as of: June, 1999
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219 /   HD   ELECTRIC HEATING

200  DF  HEATING DEVICES {14}
201  DF  .~ Combined with diverse-type art device {12}
209  DF  .~.~ Electrical devices {1}
210.~.~.~ Crystal or other vibratory device

DEFINITION

Classification: 219/210

(under subclass 209) Subject matter wherein the other art device comprises a piezo crystal or other vibratory device.

SEE OR SEARCH CLASS

310, Electrical Generator or Motor Structure,

341+, for piezoelectric crystals with temperature control means, and subclass 16 for reciprocating or vibratory motors with temperature modification.