US PATENT SUBCLASS 363 / 171
.~.~ Transformer

Current as of: June, 1999
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363 /   HD   ELECTRIC POWER CONVERSION SYSTEMS

157  DF  FREQUENCY CONVERSION (f1-f2) WITHOUT INTERMEDIATE CONVERSION TO D.C. {7}
170  DF  .~ By induction-type converter {3}
171.~.~ Transformer {1}
172  DF  .~.~.~> Saturable core

DEFINITION

Classification: 363/171

Transformer:

(under subclass 170) Subject matter wherein the induction-type device is a transformer.