US PATENT SUBCLASS 280 / 642
.~.~.~.~.~ Three- or four-wheeled chair, baby carriage, or stroller

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

29  DF  WHEELED {21}
638  DF  .~ Extensible {6}
639  DF  .~.~ Folding {7}
38  DF  .~.~.~ Pivoted wheel carrier {2}
641  DF  .~.~.~.~ Transverse axis {2}
642.~.~.~.~.~ Three- or four-wheeled chair, baby carriage, or stroller {2}
643  DF  .~.~.~.~.~.~> Convertible
644  DF  .~.~.~.~.~.~> Body made of flexible material

DEFINITION

Classification: 280/642

(under subclass 641) Folding vehicles which are in the form of a manually powered chair, baby stroller, carriage, perambulator, etc., and are structurally stable without the aid of the operator.