US PATENT SUBCLASS 52 / 650.3
.~.~ Openwork deck, walkway, ceiling, etc.

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}
648.1  DF  .~ Three-dimensional space-defining {9}
650.3.~.~ Openwork deck, walkway, ceiling, etc.

DEFINITION

Classification: 52/650.3

Openwork deck, walkway, ceiling, etc.:

(under subclass 648.1) Subject matter comprising a horizontal, openwork-platform, usually supported by girders, joists, etc., or the framework supporting said subject matter.