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DIFF Subgroup
H01J 37/285

Emission microscopes, e.g. field-emission microscopes

Introduced: July 1974

Full Title

Full titles differ between systems:

IPC:

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 > Electron or ion microscopes; Electron- or ion-diffraction tubes > Emission microscopes, e.g. field-emission microscopes

CPC:

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) > Electron or ion microscopes; Electron or ion diffraction tubes > Emission microscopes, e.g. field-emission microscopes

No child classifications to compare. This is a leaf node in both IPC and CPC.