US PATENT SUBCLASS 313 / 338
.~.~ Plural separate cathode sections

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

326  DF  ELECTRODE AND SHIELD STRUCTURES {14}
337  DF  .~ Indirectly heated cathodes {3}
338.~.~ Plural separate cathode sections

DEFINITION

Classification: 313/338

(under subclass 337) Cathodes where the cathode is provided with a plurality of electron emissive sections which are electrically insulated from each other so that the cathode affords a plurality of electrically independent cathode sections.