US PATENT SUBCLASS 52 / 649.5
.~.~.~.~.~.~ Collapsible

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}
649.1  DF  .~.~ Reinforcement for settable material {2}
649.2  DF  .~.~.~ For beam, column, etc. {2}
649.3  DF  .~.~.~.~ Having perimeter-surrounding element {1}
649.4  DF  .~.~.~.~.~ Helical {1}
649.5.~.~.~.~.~.~ Collapsible

DEFINITION

Classification: 52/649.5

Collapsible:

(under subclass 649.4) Subject matter wherein the perimeter-surrounding element is extensible when constructed, but may be collapsed for shipping or storage purposes.