US PATENT SUBCLASS 52 / 687
.~.~ Plural feet or seat

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}
687.~.~ Plural feet or seat {2}
688  DF  .~.~.~> Units attached to separate connector
689  DF  .~.~.~> Single seat

DEFINITION

Classification: 52/687

(under subclass 679) Structure including plural seats or recesses for the reinforcement member or plural supporting feet for the distance defining means.