US PATENT SUBCLASS 73 / 749
.~.~ With electrical readout

Current as of: June, 1999
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73 /   HD   MEASURING AND TESTING

700  DF  FLUID PRESSURE GAUGE {20}
747  DF  .~ U-tube liquid column {2}
749.~.~ With electrical readout {1}
750  DF  .~.~.~> Resistive

DEFINITION

Classification: 73/749

With electrical readout:

(under subclass 747) Subject matter wherein the displacement

of the liquid within the U-shaped tube generates or modifies an electric current, and the value of such current is indicative of the pressure.

SEE OR SEARCH THIS CLASS, SUBCLASS:

335.02, for current generating hygrometers or hygrostats.

717, 723, 733, and 745, for gauges with electrical readout.

753, for electric pressure gauges.

SEE OR SEARCH CLASS

310, Electrical Generator or Motor Structure, 311+, for piezoelectric devices, especially subclass 338.

374, Thermal Measuring and Testing,

188, for a thermometer with a mechanical sensor and an electrical indicator.