US PATENT SUBCLASS 123 / 554
.~.~ Combustible mixture, air, and fuel are heated separately

Current as of: June, 1999
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123 /   HD   INTERNAL-COMBUSTION ENGINES

434  DF  CHARGE FORMING DEVICE (E.G., POLLUTION CONTROL) {29}
543  DF  .~ Heating of combustible mixture {13}
554.~.~ Combustible mixture, air, and fuel are heated separately

DEFINITION

Classification: 123/554

Combustible mixture, air, and fuel are heated separately:

(under subclass 543) Subject matter in which separate means is provided to heat each of the air, fuel, and mixture.