US PATENT SUBCLASS 315 / 305
.~.~.~ Three or more fields

Current as of: June, 1999
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315 /   HD   ELECTRIC LAMP AND DISCHARGE DEVICES: SYSTEMS

291  DF  CURRENT AND/OR VOLTAGE REGULATION {7}
302  DF  .~ Current generator control {2}
304  DF  .~.~ Plural field-type generator {1}
305.~.~.~ Three or more fields

DEFINITION

Classification: 315/305

(under subclass 304) Systems wherein the generator is provided with three or more exciting fields.