US PATENT SUBCLASS 123 / FOR 109
.~ Having engine shaft position sensor (123/414)

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123 /   HD   INTERNAL-COMBUSTION ENGINES

FOR 101  DF  SPARK IGNITION TIMING CONTROL (123/406) {16}
FOR 109.~ Having engine shaft position sensor (123/414)

DEFINITION

Classification: 123/FOR.109

Having engine shaft position sensor:

Subject matter in which the timing control means has an engine shaft (crank, cam, etc.) position sensor that is significantly claimed.