US PATENT SUBCLASS 367 / 162-- .~.~.~ With resonant or damping structure

US PATENT SUBCLASS 367 / 162
.~.~.~ With resonant or damping structure

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

140	DF	SIGNAL TRANSDUCERS {4}
141	DF	.~ Underwater type {15}
157	DF	.~.~ Piezoelectric {9}
162		.~.~.~ With resonant or damping structure

DEFINITION

Classification: 367/162

With resonant or damping structure:

(under subclass 157) Subject matter wherein the piezoelectric element is combined with structure whose natural frequency of vibration is disclosed as being either the same as the operating frequency of the element or such as to absorb or attenuate undesired wave energy emanating from or applied to the piezoelectric element.

SEE OR SEARCH CLASS

310, Electrical Generator or Motor Structure,

321, 327 for similar subject matter of general utility.