US PATENT SUBCLASS 246 / 437
.~.~ Renewable and reenforced


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

415 R  DF  SWITCHES {21}
435 R  DF  .~ Point {8}
437.~.~ Renewable and reenforced


DEFINITION

Classification: 246/437

(under subclass 435) Subject matter having a point switch which has renewable or reinforced points.