US PATENT SUBCLASS 188 / 356
.~.~.~.~ Vacuum power

Current as of: June, 1999
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188 /   HD   BRAKES

*  DD  OPERATORS {11}
151 R  DF  .~ Fluid pressure {4}
152  DF  .~.~ Road vehicle {13}
355  DF  .~.~.~ With nonmanual fluid-power source {3}
356.~.~.~.~ Vacuum power {1}
357  DF  .~.~.~.~.~> And manual

DEFINITION

Classification: 188/356

(under subclass 355) Device wherein the non-manual power source is of the vacuum or sub-atmospheric pressure type.