US PATENT SUBCLASS 123 / 656
.~.~ Diode is in parallel with coil primary or secondary

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123 /   HD   INTERNAL-COMBUSTION ENGINES

594  DF  HIGH TENSION IGNITION SYSTEM {28}
650  DF  .~ Power supply, ignition coil primary, and interrupter element all in series {6}
656.~.~ Diode is in parallel with coil primary or secondary

DEFINITION

Classification: 123/656

Diode is in parallel with coil primary or secondary:

(under subclass 650) Subject matter in which a diode is placed in parallel with the primary or secondary of the ignition coil.