DIFF Subgroup
H01J 23/027 Collectors
Introduced: July 1974
Full Title
Full titles differ between systems:
IPC:
Details of transit-time tubes of the types covered by group > Electrodes; Magnetic control means; Screens > Collectors
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) > Collectors
Of 2 combined children, 1 exist in both systems.
1 codes are CPC-only extensions.
IPC defines codes here since 1974.
Child Classifications
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