US PATENT SUBCLASS 123 / 538
.~.~ Fuel only

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

434  DF  CHARGE FORMING DEVICE (E.G., POLLUTION CONTROL) {29}
536  DF  .~ Combustible mixture ionization, ozonation, or electrolysis {3}
538.~.~ Fuel only

DEFINITION

Classification: 123/538

Fuel only:

(under subclass 536) Subject matter in which said means operates on the fuel only.