US PATENT SUBCLASS 237 / 39
.~.~ Train steam

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

28  DF  VEHICLE {7}
34  DF  .~ Water {2}
39.~.~ Train steam

DEFINITION

Classification: 237/39

(under subclass 34) Subject matter having means for heating the water circuit by steam from the train pipe.