US PATENT SUBCLASS 152 / 209.27
.~.~.~.~ Having continuous circumferential narrow width groove (i.e., less than 5mm.)

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}
209.27.~.~.~.~ Having continuous circumferential narrow width groove (i.e., less than 5mm.)

DEFINITION

Classification: 152/209.27

HAVING CONTINUOUS CIRCUMFERENTIAL NARROW WIDTH GROOVE (i.e. less than 5mm.):

Tread under 209.18 wherein the groove is circumferential and its width from wall to opposite wall measures less than 5mm.