US PATENT SUBCLASS 123 / 550
.~.~ Combustion heater

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}
550.~.~ Combustion heater {1}
551  DF  .~.~.~> Part of combustible mixture is burned

DEFINITION

Classification: 123/550

Combustion heater:

(under subclass 543) Subject matter in which the means for heating uses combustion of a fuel as the source of heat.