US PATENT SUBCLASS 454 / 74
.~.~.~ Control system having electrical or electronic component

Current as of: June, 1999
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454 /   HD   VENTILATION

69  DF  VEHICLE (E.G., AUTOMOBILE, ETC.) {15}
70  DF  .~ Pressure regulation {1}
71  DF  .~.~ Ventilation of aircraft cabin {3}
74.~.~.~ Control system having electrical or electronic component

DEFINITION

Classification: 454/74

Control system having electrical or electronic component:

(under subclass 71) Subject matter including an electrical or electronic component which is essential to the operation, or activation thereof, of the automatic control system.