US PATENT SUBCLASS 182 / 132
.~ Stepped
Current as of:
June, 1999
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182 /
HD
FIRE ESCAPE, LADDER, OR SCAFFOLD
130
DF
PLURAL PLATFORMS, COMMON SUPPORT
{2}
132
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DEFINITION
Classification: 182/132
(under subclass 130) Device in which the platforms are vertically spaced and horizontally offset.