US PATENT SUBCLASS 182 / 66.1
.~.~.~ Extension ladder (i.e., ladder having sliding section)

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

63.1  DF  HAVING TRANSPOSITIONING BASE AND ERECTING MEANS {4}
64.1  DF  .~ Ladder pivotably mounted on transpositioning base (e.g., on vehicle) {2}
65.1  DF  .~.~ About vertical axis {3}
66.1.~.~.~ Extension ladder (i.e., ladder having sliding section) {2}
66.2  DF  .~.~.~.~> Motor operated
67.1  DF  .~.~.~.~> Manually operated {2}

DEFINITION

Classification: 182/66.1

Extension ladder (i.e., ladder having sliding section):

(under subclass 65.1) Device comprising a plurality of coextensive, elongated ladder units, one of which is designed to be moved along its longitudinal axis relative to the other.