US PATENT SUBCLASS 323 / 336
.~.~.~.~.~ Multistage

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

318  DF  EXTERNAL OR OPERATOR CONTROLLED {5}
328  DF  .~ Using a transformer or inductor as the final control device {6}
329  DF  .~.~ Controllably saturable {5}
332  DF  .~.~.~ With plural power windings {3}
335  DF  .~.~.~.~ On different cores {2}
336.~.~.~.~.~ Multistage

DEFINITION

Classification: 323/336

Multistage:

(under subclass 335) Subject matter wherein the output of all but the last transformer is connected as the input of the succeeding transformer.