US PATENT SUBCLASS 303 / 127
.~ Pneumatic

Current as of: June, 1999
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303 /   HD   FLUID-PRESSURE AND ANALOGOUS BRAKE SYSTEMS

121  DF  SPEED-CONTROLLED {44}
127.~ Pneumatic {1}
128  DF  .~.~> For a railway vehicle (e.g., train) {7}

DEFINITION

Classification: 303/127

Pneumatic:

(under subclass 121) Speed control in a system using a gas; e.g., air: