US PATENT SUBCLASS 313 / 477 R
.~ Envelope


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

364  DF  CATHODE RAY TUBE {11}
477 R.~ Envelope {6}
478  DF  .~.~> With external optical element
479  DF  .~.~> Coating or shielding
480  DF  .~.~> Composition
481  DF  .~.~> With getter or gas
482  DF  .~.~> Support for electrode or envelope
477 HC  DF  .~.~> With details of high-voltage connector

Unofficial Alpha Subclasses: R HC

DEFINITION

Classification: 313/477

(under subclass 364) Subject matter including an envelope.