US PATENT SUBCLASS 363 / 169
.~.~.~ Thyratron 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}
166  DF  .~ By electron tube converter {1}
167  DF  .~.~ With discharge control means {2}
169.~.~.~ Thyratron type

DEFINITION

Classification: 363/169

Thyratron type:

(under subclass 167) Subject matter wherein the electronic tube is of the thyratron type.