Skip to content
PCE
Search Classifications
Search for IPC and CPC classification codes or keywords
DIFF Subgroup Additional Only
H01J 2237/0492

Lens systems

Full Title

Discharge tubes exposing object to beam, e.g. for analysis treatment, etching, imaging > Means for controlling the discharge > Focusing means > Lens systems

Of 4 combined children, 0 exist in both systems.

4 codes are CPC-only extensions.

Note: 4 CPC extensions are marked as secondary classification only.