US PATENT SUBCLASS 246 / 456
.~ Tread guard rail

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

454  DF  CROSSINGS, FROGS, AND MATES {11}
456.~ Tread guard rail

DEFINITION

Classification: 246/456

(under subclass 454) Subject matter having crossings, frogs, and mates provided with a guard-rail acting on the rim of the wheel-tread, and thereby guiding the wheel-flanges past the frog and crossing points.

SEE OR SEARCH THIS CLASS, SUBCLASS:

441, for switch-tread guard rails.