US PATENT SUBCLASS 340 / 850
UNDERWATER
Current as of:
June, 1999
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340 /
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COMMUNICATIONS: ELECTRICAL
850
UNDERWATER
{2}
851
DF
.~
> Ship guidance system
852
DF
.~
> Electrodes and electrode systems
DEFINITION
Classification: 340/850
UNDERWATER:
(under the class definition) Subject matter in which a significant portion of the communication takes place under water.
SEE OR SEARCH THIS CLASS, SUBCLASS:
230, for electric signalling systems in which the signal is transmitted along a fluid conduit but not through the fluid therein.
SEE OR SEARCH CLASS
116, Signals and Indicators,
27, for this subject matter when nonelectrical.
367, Communications, Electrical: Acoustic Wave Systems and Devices, 131, for underwater electrical communication employing acoustic wave.
