US PATENT SUBCLASS 182 / 180.2
.~.~ Having supporting base

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

179.1  DF  SELF-SUSTAINING {5}
180.1  DF  .~ Ladder {1}
180.2.~.~ Having supporting base {1}
180.3  DF  .~.~.~> Vertically pivoted to supporting base

DEFINITION

Classification: 182/180.2

Having supporting base:

(under subclass 180.1) Device wherein the ladder is mounted upon a supporting substructure.