US PATENT SUBCLASS 180 / 117
.~ Having propulsion or control means

Current as of: June, 1999
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180 /   HD   MOTOR VEHICLES

116  DF  SURFACE EFFECT VEHICLES (I.E., GROUND EFFECT MACHINES) {7}
117.~ Having propulsion or control means {3}
118  DF  .~.~> Responsive to instability condition
119  DF  .~.~> Surface contacting control
120  DF  .~.~> Integrated with working fluid {2}

DEFINITION

Classification: 180/117

(under subclass 116) A vehicle comprising means to propel the vehicle or control the direction of movement, attitude, or propulsion of the vehicle.