US PATENT SUBCLASS 323 / 307
.~.~.~ With plural cores

Current as of: June, 1999
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323 /   HD   ELECTRICITY: POWER SUPPLY OR REGULATION SYSTEMS

304  DF  SELF-REGULATING (E.G., NONRETROACTIVE) {2}
305  DF  .~ Using a transformer or inductor as the final control device {2}
306  DF  .~.~ Ferroresonant {2}
307.~.~.~ With plural cores

DEFINITION

Classification: 323/307

With plural cores:

(under subclass 306) Subject matter wherein the ferroresonant transformer has at least two cores.