204863 ⎘
Details of transit-time tubes of the types covered by group; Electrodes; Magnetic control means; Screens; Electron or ion guns producing a solid cylindrical beam
Electron gun, electron tube and high-frequency circuit system
#2Traveling wave tube and high-frequency circuit system
#3Adjustable perveance electron gun header
#4Grid for vacuum electron device and method for manufacture of same
#5CT scanner
#6Electron gun