US PATENT SUBCLASS 105 / 427
.~.~ Operated with gate and step

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

425  DF  PLATFORMS {2}
426  DF  .~ Trapdoors {6}
427.~.~ Operated with gate and step

DEFINITION

Classification: 105/427

(under subclass 426) Platform constructions having trap doors, vertical gates or doors, and movable steps all operatively connected together.