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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

Top Applicants

Top Applicants (IPC)

Class G01,2013–2023, worldwide · Source: EPO PATSTAT

  1. SGCC(STATE GRID CORPORATION OF CHINA) 41,447
  2. CHINESE ACADEMY OF SCIENCES 32,952
  3. ROBERT BOSCH DE 16,470
  4. SAMSUNG ELECTRONICS COMPANY KR 10,052
  5. SINOPEC (CHINA PETROCHEMICAL CORPORATION) 9,573
  6. ZHEJIANG UNIVERSITY 9,529
  7. GUANGDONG POWER GRID CORPORATION 8,615
  8. TSINGHUA UNIVERSITY 7,805
  9. HALLIBURTON ENERGY SERVICES GROUP US 7,796
  10. QUALCOMM US 7,171

Top Applicants (CPC)

Class G01,2013–2023, worldwide · Source: EPO PATSTAT

  1. CHINESE ACADEMY OF SCIENCES 21,460
  2. ROBERT BOSCH DE 17,801
  3. SGCC(STATE GRID CORPORATION OF CHINA) 17,347
  4. SAMSUNG ELECTRONICS COMPANY KR 13,192
  5. QUALCOMM US 9,900
  6. HALLIBURTON ENERGY SERVICES GROUP US 9,742
  7. PHILIPS ELECTRONICS NL 7,249
  8. MITSUBISHI ELECTRIC CORPORATION JP 6,503
  9. ZHEJIANG UNIVERSITY 6,414
  10. DENSO CORPORATION JP 6,382