US PATENT SUBCLASS 182 / 96
.~.~.~ Parallelogram type

Current as of: June, 1999
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182 /   HD   FIRE ESCAPE, LADDER, OR SCAFFOLD

82  DF  WALL- OR FLOOR-ATTACHED {7}
93  DF  .~ Ladder {4}
95  DF  .~.~ Folding, rigid components {1}
96.~.~.~ Parallelogram type

DEFINITION

Classification: 182/96

(under subclass 95) Device comprising hinge means restricting folding by a stile moving through a plane passing through the major axes of the rungs or steps.