US PATENT SUBCLASS 52 / 680
.~.~.~ Hook-type head integral with penetrating leg

Current as of: June, 1999
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52 /   HD   STATIC STRUCTURES (E.G., BUILDINGS)

633  DF  OPENWORK; E.G., TRUSS, TRELLIS, GRILLE, SCREEN, FRAME, OR REBAR CHAIR {12}
677  DF  .~ Spacer-positioner; e.g., rebar chair {5}
679  DF  .~.~ Penetrator with limiting stop {2}
680.~.~.~ Hook-type head integral with penetrating leg

DEFINITION

Classification: 52/680

(under subclass 679) Structure comprising a headed end opposite to a penetrating end, which headed end includes a hook-like projection integral with the shank.