DIFF Subgroup Additional Only
H01J 2237/33 characterised by the type of processing
Full Title
Discharge tubes exposing object to beam, e.g. for analysis treatment, etching, imaging > Processing objects by plasma generation > characterised by the type of processing
Of 6 combined children, 0 exist in both systems.
6 codes are CPC-only extensions.
Note: 6 CPC extensions are marked as secondary classification only.