US PATENT SUBCLASS 180 / 9.56
.~.~.~.~.~ Longitudinally extending coil spring

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

7.1  DF  SPECIAL DRIVING DEVICE {6}
9  DF  .~ Portable track {2}
9.1  DF  .~.~ Endless, flexible {12}
9.5  DF  .~.~.~ Track support mounted for vertical movement {2}
9.54  DF  .~.~.~.~ With spring {2}
9.56.~.~.~.~.~ Longitudinally extending coil spring

DEFINITION

Classification: 180/9.56

(under subclass 9.54) Motor vehicles wherein said spring means comprises a coil spring extending in a longitudinal direction relative to the vehicle frame.