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PCE
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DIFF Subgroup
G01N 27/83

by investigating stray magnetic fields

Introduced: January 1980

Full Title

Full titles differ between systems:

IPC:

Investigating or analysing materials by the use of electric, electrochemical, or magnetic means > by investigating magnetic variables > for investigating the presence of flaws > by investigating stray magnetic fields

CPC:

Investigating or analysing materials by the use of electric, electrochemical, or magnetic means (G01N3/00 – G01N25/00 take precedence; measurement or testing of electric or magnetic variables or of electric or magnetic properties of materials G01R) > by investigating magnetic variables > for investigating the presence of flaws > by investigating stray magnetic fields

IPC and CPC are identically structured here. All 3 subcodes exist in both systems.

Child Classifications

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  • G01N 27/84 by applying magnetic powder or magnetic ink IPC+CPC Available in IPC and CPC
  • G01N 27/85 using magnetographic methods since 1980 IPC+CPC Available in IPC and CPC
  • G01N 27/87 using probes since 1980 IPC+CPC Available in IPC and CPC