US PATENT SUBCLASS 237 / 73
.~ Steam

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

70  DF  HEAT RADIATORS {6}
73.~ Steam {2}
74  DF  .~.~> Circuit
75  DF  .~.~> Heat accumulator

DEFINITION

Classification: 237/73

(under subclass 70) Radiators limited to the use of steam as a heating fluid and incapable of being used as a condenser for steam.

SEE OR SEARCH THIS CLASS, SUBCLASS:

40, for steam heaters for vehicles.