Tungsten-thorium dioxide-aluminum oxide mass for a high-temperat
Two-layer cathode for electron gun
Uniform field emission device
Uniform filament and method of making the same
Uniformization of the electron emission of a flat screen microti
Unitized chemically etched tungsten electrode
Vacuum electron device having directly-heated matrix-cathode-hea
Vacuum electron tube having an oxide cathode comprising chromium
Vacuum microdevice and method of manufacturing the same
Welded tungsten filament to lead joint
Wire mesh cathode
Wire shaped electron source
Wire-mesh cathode
X-ray target
X-ray target with substrate of molybdenum alloy
X-ray tube for microstructure analysis
X-ray tube for the examination of fine structures
X-Ray tube target having pyrolytic amorphous carbon coating