US PATENT SUBCLASS 246 / 478
.~ Enclosed

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

473 R  DF  SIGNALS {12}
478.~ Enclosed

DEFINITION

Classification: 246/478

(under subclass 473) Subject matter having signals whose moving parts are for the most part enclosed or boxed in for protection from the weather-as, for example, the disk and circular-box or banjo type of signal.