US PATENT SUBCLASS 182 / 54
.~ With step or additional platform

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

53  DF  DETACHABLE WINDOW SEAT TYPE {4}
54.~ With step or additional platform

DEFINITION

Classification: 182/54

(under subclass 53) Device with a step, rung or additional platform.