US PATENT SUBCLASS 246 / 391
.~.~ Wing

Current as of: June, 1999
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246 /   HD   RAILWAY SWITCHES AND SIGNALS

382  DF  SWITCH-CONNECTED FROGS {6}
389  DF  .~ Swinging rail {2}
391.~.~ Wing

DEFINITION

Classification: 246/391

(under subclass 389) Subject matter in which switch-connected frogs are provided with a fixed frog-point and swinging wing-rails.