US PATENT SUBCLASS 33 / 716
.~.~ Including electrical signal means
Current as of:
June, 1999
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33 /
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GEOMETRICAL INSTRUMENTS
700
DF
DISTANCE MEASURING
{13}
713
DF
.~ Sounding type {6}
716
.~.~ Including electrical signal means
DEFINITION
Classification: 33/716
Including electric signal means:
(under subclass 713) Subject matter having an electric circuit which is actuated when a fluid is contacted resulting in a visual or audible signal.