US PATENT SUBCLASS 172 / 259
.~ With vertically adjustable wheel

Current as of: June, 1999
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172 /   HD   EARTH WORKING

256  DF  PROPULSION UNIT GUIDED BY WALKING ATTENDANT OR PART OF ARTICULATED VEHICLE {4}
259.~ With vertically adjustable wheel

DEFINITION

Classification: 172/259

(under subclass 256) Apparatus in which a ground wheel may be vertically adjustable with respect to its carrying frame.

(1) Note. For the meaning of "adjustable" see the class definition.