US PATENT SUBCLASS 303 / 51
.~ Conductor type

Current as of: June, 1999
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303 /   HD   FLUID-PRESSURE AND ANALOGOUS BRAKE SYSTEMS

50  DF  MOTORMAN'S VALVES {4}
51.~ Conductor type

DEFINITION

Classification: 303/51

Valves placed in the control-pipe and adapted to be operated by some one other than the motorman.