US PATENT SUBCLASS 152 / 209.25
.~.~.~.~ Having grooves or sipes with different specified depths

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}
209.25.~.~.~.~ Having grooves or sipes with different specified depths

DEFINITION

Classification: 152/209.25

HAVING GROOVES OR SIPES WITH DIFFERENT SPECIFIED DEPTHS:

Tread under 209.18 wherein at least one groove or sipe has a depth different from the depth of a second groove or sipe depth.