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DIFF Subgroup
G01N 29/44

Processing the detected response signal

Introduced: January 2006

Full Title

Full titles differ between systems:

IPC:

Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object > Processing the detected response signal

CPC:

Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object (G01N3/00 - G01N27/00 take precedence) > Processing the detected response signal

CPC subdivides this area 3x more granularly than IPC with 7 additional codes.

7 codes are CPC-only extensions.

1 shared codes have differing titles between IPC and CPC.

IPC defines codes here since 2006.

Child Classifications

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  • G01N 29/4445 CPC only CPC only
  • G01N 29/4454 CPC only CPC only
  • G01N 29/4463 CPC only CPC only
  • G01N 29/4472 CPC only CPC only
  • G01N 29/4481 CPC only CPC only
  • G01N 29/449 CPC only CPC only
  • G01N 29/46 by spectral analysis, e.g. Fourier analysis since 2006 IPC+CPC Available in IPC and CPC
  • G01N 29/48 by amplitude comparison since 2006 IPC+CPC Available in IPC and CPC
  • G01N 29/50 using auto-correlation techniques or cross-correlation techniques since 2006 IPC+CPC Available in IPC and CPC
  • G01N 29/52 using inversion methods other that spectral analysis, e.g. conjugated gradient inversion since 2006 IPC+CPC Available in IPC and CPC