US PATENT SUBCLASS 60 / 538
.~.~.~ Including electrical control or actuation

Current as of: June, 1999
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60 /   HD   POWER PLANTS

325  DF  PRESSURE FLUID SOURCE AND MOTOR {47}
533  DF  .~ Pulsator {25}
537  DF  .~.~ Programmed, self-cycled or self-pulsed {7}
538.~.~.~ Including electrical control or actuation

DEFINITION

Classification: 60/538

(under subclass 537) Apparatus in which the apparatus or its control has an electrically operated element.