US PATENT SUBCLASS 152 / 209.15
.~.~.~ Characterized by shape of upper surface of tread element (e.g., block with upper convex surface, etc.)

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}
209.15.~.~.~ Characterized by shape of upper surface of tread element (e.g., block with upper convex surface, etc.)

DEFINITION

Classification: 152/209.15

CHARACTERIZED BY SHAPE OF UPPER SURFACE OF TREAD ELEMENT (e.g., block with upper convex surface, etc.):

(under subclass 209.1) Tread having the shape of the upper surface of a tread element (i.e., surface of tread element intended to contact road) specified.

SEE OR SEARCH THIS CLASS, SUBCLASS:

209.14, for tread elements having their upper surface defined only by the radius of curvature or the tread.