US PATENT SUBCLASS 237 / 12.3 R
.~ Vehicle

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

12.1  DF  HEAT AND POWER PLANTS {3}
12.3 R.~ Vehicle {3}
12.3 A  DF  .~.~> The heating is effected by circulated air
12.3 B  DF  .~.~> The heating is effected by circulated hot water
12.3 C  DF  .~.~> The heating system includes a combustion type heater

Unofficial Alpha Subclasses: R A B C

DEFINITION

Classification: 237/12.3

(under subclass 12.1) Combinations including a heating system for a vehicle other than a railway car or train.

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2, for similar systems claiming automatic controls.

SEE OR SEARCH CLASS

123, Internal-Combustion Engines,

142.5, for internal combustion engines combined with means to heat the engine or engine parts there provided for and see notes in that subclass (142.5).

165, Heat Exchange, 43+, for a heated and cooled vehicle with a common power and heat source.

454, Ventilation,

159+, for automobile heating and ventilating.