US PATENT SUBCLASS 52 / 644
.~.~ Arcuate chord

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}
639  DF  .~ Curvilinear or peaked truss {5}
644.~.~ Arcuate chord

DEFINITION

Classification: 52/644

(under subclass 639) Structure wherein one of the elongated peripheral members is longitudinally curved.