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PCE
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DIFF Subgroup
G01N 21/67

using electric arcs or discharges

Introduced: January 1980

Full Title

Full titles differ between systems:

IPC:

Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light > Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light > electrically excited, e.g. electroluminescence > using electric arcs or discharges

CPC:

Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light (G01N3/00 - G01N19/00 take precedence) > Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light > electrically excited, e.g. electroluminescence > using electric arcs or discharges

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