US PATENT SUBCLASS 24 / 411
.~.~.~ Including complementary formations on opposite walls for engaging mating elements

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  DF  .~.~ Having interlocking portion with specific shape {2}
411.~.~.~ Including complementary formations on opposite walls for engaging mating elements {1}
412  DF  .~.~.~.~> Mating elements having reversed orientation of formations

DEFINITION

Classification: 24/411

Including complementary formations on opposite walls for engaging mating elements:

(under subclass 409) Discrete element face including two, complementary-shaped formations (e.g., cavity and projection) located on opposite sides of the discrete element for interlocking with complementary formations on two different discrete elements of the mating interlocking surface.