US PATENT SUBCLASS 280 / 288.3
.~.~.~ Hollow shell frames

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

29  DF  WHEELED {21}
200  DF  .~ Occupant propelled type {8}
281.1  DF  .~.~ Frames and running gear {7}
288.3.~.~.~ Hollow shell frames

DEFINITION

Classification: 280/288.3

Hollow shell frames:

(under subclass 281.1) Vehicles in which load bearing structure is formed from hollow panels, typically comprised of joined hollow shell halves rather than a tubular skeletal truss structure.