US PATENT SUBCLASS 24 / 409
.~.~ Having interlocking portion with specific shape

Current as of: June, 1999
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24 /   HD   BUCKLES, BUTTONS, CLASPS, ETC.

381  DF  ZIPPER OR REQUIRED COMPONENT THEREOF {15}
403  DF  .~ Interlocking surface constructed from plural elements in series {7}
409.~.~ Having interlocking portion with specific shape {2}
410  DF  .~.~.~> Including symmetrical formations on opposite walls for engaging mating elements
411  DF  .~.~.~> Including complementary formations on opposite walls for engaging mating elements {1}

DEFINITION

Classification: 24/409

Having interlocking portion with specific shape:

(under subclass 403) Element wherein the portion of the discrete element intended to contact and interlock with a portion of an identical discrete element or elements of the mating interlocking surface includes a face having specific shape or contour (e.g., hooked).