US PATENT SUBCLASS 363 / 163
.~.~ Transistor type

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}
159  DF  .~ By semiconductor converter {2}
163.~.~ Transistor type

DEFINITION

Classification: 363/163

Transistor type:

(under subclass 159) Subject matter where the semiconductor device is of the transistor type.