US PATENT SUBCLASS 152 / 209.21
.~.~.~.~ Protrusion from wall and spaced from the opposite wall

Current as of: June, 1999
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152 /   HD   RESILIENT TIRES AND WHEELS

151  DF  TIRES, RESILIENT {14}
208  DF  .~ Anti-skid devices {8}
209.1  DF  .~.~ Tread {13}
209.18  DF  .~.~.~ Having groove or sipe with specified dimension or structure therewithin {8}
209.21.~.~.~.~ Protrusion from wall and spaced from the opposite wall

DEFINITION

Classification: 152/209.21

PROTRUSION FROM WALL AND SPACED FROM THE OPPOSITE WALL:

Tread under 209.18 having an element projecting from one wall and spaced from the opposing wall of the groove or sipe.