US PATENT SUBCLASS 237 / 42
.~.~.~ Train steam

Current as of: June, 1999
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237 /   HD   HEATING SYSTEMS

28  DF  VEHICLE {7}
40  DF  .~ Steam {1}
41  DF  .~.~ Car boiler {1}
42.~.~.~ Train steam

DEFINITION

Classification: 237/42

(under subclass 41) Subject matter having also means whereby steam may be admitted to the radiators from the train pipe.