CPC Subgroup
H01J 37/22 Optical or photographic arrangements associated with the tube
Full Title
Discharge tubes with provision for introducing objects or material to be exposed to the discharge, e.g. for the purpose of examination or processing thereof (H01J33/00, H01J40/00, H01J41/00, H01J47/00, H01J49/00 take precedence) > Details > Optical or photographic arrangements associated with the tube
3 direct subcodes
Child Classifications
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