US PATENT SUBCLASS 182 / 131
.~ Mounted for relative motion

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

130  DF  PLURAL PLATFORMS, COMMON SUPPORT {2}
131.~ Mounted for relative motion

DEFINITION

Classification: 182/131

(under subclass 130) Device in which at least one platform is movable with respect to another.