by investigating impedance

Introduced: September 1968

Full Title

Full titles differ between systems:

IPC:

Investigating or analysing materials by the use of electric, electrochemical, or magnetic means > by investigating impedance

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 impedance

CPC subdivides this area 3x more granularly than IPC with 4 additional codes.

4 codes are CPC-only extensions.

Child Classifications

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G01N 27/021 CPC only CPC only
G01N 27/023 +1 CPC CPC only CPC only
G01N 27/026 CPC only CPC only
G01N 27/028 CPC only CPC only
G01N 27/04 by investigating resistance +4 CPC IPC+CPC Available in IPC and CPC
G01N 27/22 by investigating capacitance +5 CPC IPC+CPC Available in IPC and CPC