US PATENT SUBCLASS 52 / 592.3
.~.~.~.~ In a vertical arrangement

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

578  DF  MODULE OR PANEL HAVING DISCRETE EDGEWISE OR FACE-TO-FACE CONNECTING FEATURE {6}
589.1  DF  .~ Having integral key {3}
592.1  DF  .~.~ Keys, mortises, or key and mortise on opposed edges or faces {3}
592.2  DF  .~.~.~ Key designed for four direction lock {1}
592.3.~.~.~.~ In a vertical arrangement

DEFINITION

Classification: 52/592.3

In a vertical arrangement:

(under subclass 592.2) Integral four direction lock key on opposed edges wherein the unit is assembled in an upright position.