Cathodes

Introduced: September 1968

Full Title

Full titles differ between systems:

IPC:

Details of transit-time tubes of the types covered by group > Electrodes; Magnetic control means; Screens > Cathodes

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) > Cathodes

IPC and CPC are identically structured here. All 1 subcodes exist in both systems.

IPC defines codes here since 1980.

Child Classifications

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H01J 23/05 having a cylindrical emissive surface, e.g. cathodes for magnetrons since 1980 IPC+CPC Available in IPC and CPC