US PATENT SUBCLASS 367 / 141
.~ Underwater type

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

140  DF  SIGNAL TRANSDUCERS {4}
141.~ Underwater type {15}
142  DF  .~.~> Exclusive-type transmitter {6}
149  DF  .~.~> Exclusive-type receiver
150  DF  .~.~> With modifying lens
151  DF  .~.~> With reflector
152  DF  .~.~> With impedance matching means
153  DF  .~.~> Plural transducer array {3}
157  DF  .~.~> Piezoelectric {9}
168  DF  .~.~> Magnetostrictive
169  DF  .~.~> Elongated continuous type
170  DF  .~.~> Electret
171  DF  .~.~> Liquid filled transducer
172  DF  .~.~> Transducer with pressure compensating means
173  DF  .~.~> Transducer with support
174  DF  .~.~> Transducer with diaphragm {1}
176  DF  .~.~> Transducer with resonant or damping structure

DEFINITION

Classification: 367/141

Underwater type:

(under subclass 140) Subject matter wherein the acoustic waves propagate to or from the transducer in water.

SEE OR SEARCH CLASS

73, Measuring and Testing,

570+, for vibration sensing apparatus utilized in the physical testing of materials.

116, Signals and Indicators,

27, for mechanical submarine bells.

181, Acoustics,

.5, and 113-121 for miscellaneous acoustical systems such as supersonic systems having electroacoustical transducers. 310, Electrical Generator or Motor Structure,

311+, for piezoelectric generators; and subclass 26 for magnetostrictive generators.