US PATENT SUBCLASS 246 / 428
.~ Snow protected

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

415 R  DF  SWITCHES {21}
428.~ Snow protected

DEFINITION

Classification: 246/428

(under subclass 415) Subject matter having switches so constructed as not to be readily clogged by snow and ice, which is usually either melted or automatically removed by the movement of the switch.

SEE OR SEARCH THIS CLASS, SUBCLASS:

444, for self-cleaning switches.