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DIFF Subgroup
G01N 29/04

Analysing solids (using acoustic emission techniques G01N29/14)

Introduced: September 1968

Title

Titles differ between systems:

IPC: Analysing solids

CPC: Analysing solids (using acoustic emission techniques G01N29/14)

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 > Analysing solids

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) > Analysing solids (using acoustic emission techniques G01N29/14)

Of 9 combined children, 5 exist in both systems.

4 codes are CPC-only extensions.

IPC defines codes here since 1985.

Child Classifications

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  • G01N 29/041 CPC only CPC only
  • G01N 29/043 CPC only CPC only
  • G01N 29/048 CPC only CPC only
  • G01N 29/09 by measuring mechanical or acoustic impedance since 2006 IPC+CPC Available in IPC and CPC
  • G01N 29/11 by measuring attenuation of acoustic waves since 2006 IPC+CPC Available in IPC and CPC
  • G01N 29/12 by measuring frequency or resonance of acoustic waves since 1990 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