US PATENT SUBCLASS 320 / FOR 166
.~.~.~ Auxiliary source or field circuit e.m.f. (320/67)

Current as of: June, 1999
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320 /   HD   ELECTRICITY: BATTERY OR CAPACITOR CHARGING OR DISCHARGING

FOR 101  DF  BATTERY CHARGING AND/OR DISCHARGING (320/2) {15}
FOR 160  DF  .~ Generation systems for battery charging (320/61) {4}
FOR 163  DF  .~.~ Generator field-winding circuit control (320/64) {3}
FOR 166.~.~.~ Auxiliary source or field circuit e.m.f. (320/67)

DEFINITION

Classification: 320/FOR.166

Foreign art collection in which two or more sources of e.m.f., are connected in series with each other and with the field producing winding.