US PATENT SUBCLASS 361 / 817
.~.~.~ For electronic tube

Current as of: June, 1999
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361 /   HD   ELECTRICITY: ELECTRICAL SYSTEMS AND DEVICES

600  DF  HOUSING OR MOUNTING ASSEMBLIES WITH DIVERSE ELECTRICAL COMPONENTS {11}
679  DF  .~ For electronic systems and devices {15}
816  DF  .~.~ Shielding {2}
817.~.~.~ For electronic tube

DEFINITION

Classification: 361/817

For electronic tube:

(under subclass 816) Subject matter wherein electric or magnetic field shielding or screening means is provided for a hermetically sealed glass or metal envelope in which

conduction of electrons takes place through a vacuum or gas.

SEE OR SEARCH CLASS

313, Electric Lamp and Discharge Devices,

326+, for electric lamp and discharge devices having electrode and shield structures.

315, Electric Lamp and Discharge Devices: Systems,

85, for electric lamp and discharge devices systems having shielding means for part of the system.