US PATENT SUBCLASS 310 / 367
.~.~ Piezoelectric element shape

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}
367.~.~ Piezoelectric element shape {4}
368  DF  .~.~.~> Rectangular plate
369  DF  .~.~.~> Circular disc, ring, or cylinder
370  DF  .~.~.~> "U" or "tuning fork" shape
371  DF  .~.~.~> Sphere or hemisphere

DEFINITION

Classification: 310/367

Piezoelectric element shape:

(under subclass 311) Subject matter comprising piezoelectric materials and elements wherein the shape, proportions, or dimensions of the element or material is significant.

(1) Note. "Element" for the purpose of this subclass includes any structure consisting essentially of a plurality of pieces of piezoelectric material intimately joined together to form a composite structure.

SEE OR SEARCH THIS CLASS, SUBCLASS:

357+, where the specific polarization direction is significant with respect to the piezoelectric property.

360+, where the specific orientation of the crystal axis of the material is significant with respect to the piezoelectric property.