US PATENT SUBCLASS 301 / 93
.~.~.~.~ Both right- and left-threaded

Current as of: June, 1999
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301 /   HD   LAND VEHICLES: WHEELS AND AXLES

5.1  DF  WHEEL {21}
86  DF  .~ Nonresilient tire {3}
91  DF  .~.~ Adjustable circumference tire {2}
92  DF  .~.~.~ Adjustable by use of screw {1}
93.~.~.~.~ Both right- and left-threaded

DEFINITION

Classification: 301/93

(under subclass 92) Wheel wherein the screw is provided at opposite ends with right and left hand threads.