US PATENT SUBCLASS 367 / 155
.~.~.~ Piezoelectric

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}
153  DF  .~.~ Plural transducer array {3}
155.~.~.~ Piezoelectric

DEFINITION

Classification: 367/155

Piezoelectric:

(under subclass 153) Subject matter wherein the transducers are of the piezoelectric type.

(1) Note. Piezoelectric transducers of this subclass type are defined in subclass 157, below.

SEE OR SEARCH THIS CLASS, SUBCLASS:

157, piezoelectric underwater acoustical transducers, per se, of this class type.