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DIFF Subgroup
H01J 23/07

producing a hollow cylindrical beam (H01J23/075 takes precedence)

Introduced: January 1980

Title

Titles differ between systems:

IPC: producing a hollow cylindrical beam

CPC: producing a hollow cylindrical beam (H01J23/075 takes precedence)

Full Title

Full titles differ between systems:

IPC:

Details of transit-time tubes of the types covered by group > Electrodes; Magnetic control means; Screens > Electron or ion guns > producing a hollow cylindrical beam

CPC:

Details of transit-time tubes of the types covered by group H01J25/00 > Electrodes; Magnetic control means; Screens (associated with resonator or delay system H01J23/16) > Electron or ion guns > producing a hollow cylindrical beam (H01J23/075 takes precedence)

No child classifications to compare. This is a leaf node in both IPC and CPC.