US PATENT SUBCLASS 182 / 182.3
.~.~.~.~ Step-by-step adjustment

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

179.1  DF  SELF-SUSTAINING {5}
181.1  DF  .~ Scaffold horse (e.g., trestle) {7}
182.1  DF  .~.~ Having height adjustable beam {3}
182.2  DF  .~.~.~ By extensible leg brace {1}
182.3.~.~.~.~ Step-by-step adjustment

DEFINITION

Classification: 182/182.3

Step-by-step adjustment:

(under subclass 182.2) Device wherein the adjustment of the intermediate extensible shaft is incremental.