DIFF Subgroup
H01J 27/20 using particle bombardment, e.g. ionisers
Introduced: January 1980
Full Title
Full titles differ between systems:
IPC:
Ion beam tubes > Ion sources; Ion guns > using particle bombardment, e.g. ionisers
CPC:
Ion beam tubes (H01J25/00, H01J33/00, H01J37/00 take precedence; particle accelerators H05H) > Ion sources; Ion guns > using particle bombardment, e.g. ionisers
Of 2 combined children, 1 exist in both systems.
1 codes are CPC-only extensions.
IPC defines codes here since 1980.
Child Classifications
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