US PATENT SUBCLASS 182 / 183.1
.~.~ Having longitudinally extensible beam

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}
183.1.~.~ Having longitudinally extensible beam

DEFINITION

Classification: 182/183.1

Having longitudinally extensible beam:

(under subclass 181.1) Device wherein the beam is comprised of a plurality of horizontal beam sections slidably connected for extension or contraction.