US PATENT SUBCLASS 301 / 47
.~.~.~.~.~ Supported by supplemental wheel attachment

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

5.1  DF  WHEEL {21}
41.1  DF  .~ Traction increasing {5}
43  DF  .~.~ Projecting cleat {2}
45  DF  .~.~.~ Movable {2}
46  DF  .~.~.~.~ Adjustable {3}
47.~.~.~.~.~ Supported by supplemental wheel attachment

DEFINITION

Classification: 301/47

(under subclass 46) Wheel wherein the cleat is carried by a supplemental support adapted for attachment to a conventional type of wheel.