204799 ⎘
Details of vacuum tubes of the types covered by group; Electron-emitting electrodes; Cathodes; Thermionic cathodes characterised by the shape
Sub-classes:Electron emitter source
#2Low aberration, high intensity electron beam for X-ray tubes
#3X-ray tube
#4Thermal field emitter tip, electron beam device including a thermal field emitter tip and method for operating an electron beam device
#5Thermal-field type electron source composed of transition metal carbide material
#6Thermal-field type electron source composed of transition metal carbide material with artificial facet