US PATENT SUBCLASS 318 / 645
.~.~ With fluid pressure measuring instruments

Current as of: June, 1999
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318 /   HD   ELECTRICITY: MOTIVE POWER SYSTEMS

560  DF  POSITIONAL SERVO SYSTEMS (E.G., SERVOMECHANISMS) {23}
638  DF  .~ With particular "error-detecting" means {13}
645.~.~ With fluid pressure measuring instruments

DEFINITION

Classification: 318/645

(under subclass 638) Subject matter in which the error detecting means is a fluid pressure measuring instrument.

SEE OR SEARCH THIS CLASS, SUBCLASS:

481, for open-loop automatic motor controls responsive to pressure in a fluid or granular material.

SEE OR SEARCH CLASS

73, Measuring and Testing,

37+, for measuring and testing devices with pressure measuring instruments.

340, Communications: Electrical, 626, for electrical communication systems automatically

responsive to pressure.