US PATENT SUBCLASS 237 / 12.4
.~ Car

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

12.1  DF  HEAT AND POWER PLANTS {3}
12.4.~ Car {3}
12.5  DF  .~.~> Smoke
12.6  DF  .~.~> Air {1}
12.8  DF  .~.~> Steam

DEFINITION

Classification: 237/12.4

(under subclass 12.1) Heating systems for a car or train, combined with the locomotive or other power plant.