US PATENT SUBCLASS 105 / 447
.~ Folding

Current as of: June, 1999
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105 /   HD   RAILWAY ROLLING STOCK

443  DF  STEPS {6}
447.~ Folding {1}
448  DF  .~.~> Z-fold riser

DEFINITION

Classification: 105/447

(under subclass 443) Steps pivoted so as to be folded or swung to inoperative position.