US PATENT SUBCLASS 367 / 148
.~.~.~ Electrically driven underwater bells or sirens

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}
142  DF  .~.~ Exclusive-type transmitter {6}
148.~.~.~ Electrically driven underwater bells or sirens

DEFINITION

Classification: 367/148

Electrically driven underwater bells or sirens:

(under subclass 142) Subject matter comprising either an electrically driven bell or an electrically driven siren.

(1) Note. The sirens and bells, per se, of this subclass type are of the type defined in subclasses 147 and 148, respectively, of Class 116, Signals and Indicators.

SEE OR SEARCH CLASS

116, Signals and Indicators,

27, for mechanically operated underwater bells and sirens.