US PATENT SUBCLASS 188 / 139
.~.~.~ Gravity control

Current as of: June, 1999
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188 /   HD   BRAKES

*  DD  OPERATORS {11}
110  DF  .~ Automatic {3}
135  DF  .~.~ Momentum {4}
139.~.~.~ Gravity control

DEFINITION

Classification: 188/139

The operation of the momentum-brake is initiated or controlled by the action of a weight.