US PATENT SUBCLASS 280 / 105
.~.~ Roller bearing frame

Current as of: June, 1999
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280 /   HD   LAND VEHICLES

29  DF  WHEELED {21}
80.1  DF  .~ Running gear {20}
105.~.~ Roller bearing frame

DEFINITION

Classification: 280/105

(under subclass 80.1) Vehicles in which the running gear is modified for roller-bearings to carry the frame on the supporting-wheels or rotating axles. The presence of mere roller or ball bearing wheels does not bring a patent into this subclass.