US PATENT SUBCLASS 303 / 139
.~ And traction control

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

121  DF  SPEED-CONTROLLED {44}
139.~ And traction control {6}
140  DF  .~.~> With yaw control
141  DF  .~.~> With engine torque power take-off (PTO) control
142  DF  .~.~> Motor control
143  DF  .~.~> With four wheel drive or all wheel drive
144  DF  .~.~> Intersecting traction and skid occurrence
145  DF  .~.~> Odd condition (e.g., fuel supply cut-off, modulating valve)

DEFINITION

Classification: 303/139

And traction control:

(under subclass 121) Speed control in which the braking action is regulated by a reaction to skidding.