US PATENT SUBCLASS 367 / 166
.~.~.~ Liquid filled

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}
166.~.~.~ Liquid filled

DEFINITION

Classification: 367/166

Liquid filled:

(under subclass 157) Subject matter wherein the transducer is filled with a liquid for transmitting acoustic wave to or from a fluid medium.