H01J19/04 - CPC Classification Index

ClassID:

204792 ⎘

H01J19/04 - CPC Classification

Classification description:

Details of vacuum tubes of the types covered by group; Electron-emitting electrodes; Cathodes Thermionic cathodes

Sub-classes:

Devices and methods for enhancing the collection of electrons

Method of manufacturing an article with integral active electronic component

X-ray generation from a super-critical field

Printed active device with a 3D thermionic electronic component