US PATENT SUBCLASS 246 / 72
.~.~.~.~ Propulsion-current signaling

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


246 /   HD   RAILWAY SWITCHES AND SIGNALS

20  DF  BLOCK-SIGNAL SYSTEMS {4}
27  DF  .~ Automatic {5}
28 R  DF  .~.~ Electric {18}
62  DF  .~.~.~ Cab signal or train control {7}
72.~.~.~.~ Propulsion-current signaling

DEFINITION

Classification: 246/72

(under subclass 62) Systems in which the electrical energy is derived from the propulsion-current.

SEE OR SEARCH THIS CLASS, SUBCLASS:

81+, for propulsion-current signaling.

167+, and all subclasses mentioned in the search notes appended thereto, for cab and control features.