US PATENT SUBCLASS 246 / 121
.~ Electric

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

120  DF  ROADWAY-DEFECT PROTECTION {1}
121.~ Electric

DEFINITION

Classification: 246/121

(under subclass 120) Subject matter having roadway-defect signals which are actuated or controlled by electrical means.

SEE OR SEARCH THIS CLASS, SUBCLASS:

246+, and appropriate subclasses mentioned in the search notes appended thereto, for structure of the circuit-controllers.

473+, and appropriate subclasses mentioned in the search notes appended thereto, for signal structure.