US PATENT SUBCLASS 104 / 268
.~ One way

Current as of: June, 1999
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104 /   HD   RAILWAYS

262  DF  CAR REPLACER {7}
268.~ One way {3}
269  DF  .~.~> Symmetrical
270  DF  .~.~> Saddles
271  DF  .~.~> Pivoted ramp

DEFINITION

Classification: 104/268

(under subclass 262) Car-replacing frog-blocks which are operative in only one direction of the car-wheel relatively to said block.