US PATENT SUBCLASS 33 / 713
.~ Sounding type

Current as of: June, 1999
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33 /   HD   GEOMETRICAL INSTRUMENTS

700  DF  DISTANCE MEASURING {13}
713.~ Sounding type {6}
714  DF  .~.~> With electric control means {1}
716  DF  .~.~> Including electrical signal means
717  DF  .~.~> With sampling means {1}
719  DF  .~.~> Depth indication
720  DF  .~.~> Line with weight
721  DF  .~.~> For nongaseous material {1}

DEFINITION

Classification: 33/713

Sounding type:

(under subclass 700) Subject matter having means for (a) ascertaining the depth of bodies of fluent material or (b) measuring the distance from a datum to the surface of fluent material.

(1) Note. Such devices for measuring distances from an aerial vehicle to the earth's surface are here included.

(2) Note. See the notes to the class definition of Class 73, Measuring and Testing for a statement of the line for devices for determining depths and distances by sonic or electrical wave means.

SEE OR SEARCH CLASS

73, Measuring and Testing,

290+, for means for measuring depth of liquid other than by mere measurement of distance, as by static liquid pressures, float-operated devices, propeller wheels, sight glasses, etc.

116, Signals and Indicators, 113, for devices designed to give a signal or warning when a particular depth is reached, but not designed to measure variable depths.