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PCE
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DIFF Subgroup
G01N 21/892

characterised by the flaw, defect or object feature examined

Introduced: January 2000

Full Title

Full titles differ between systems:

IPC:

Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light > Systems specially adapted for particular applications > Investigating the presence of flaws, defects or contamination > in moving material, e.g. paper, textiles > characterised by the flaw, defect or object feature examined

CPC:

Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light (G01N3/00 - G01N19/00 take precedence) > Systems specially adapted for particular applications > Investigating the presence of flaws or contamination > in moving material, e.g. running paper or textiles (G01N21/90, G01N21/91, G01N21/94 take precedence) > characterised by the flaw, defect or object feature examined

CPC subdivides this area 3x more granularly than IPC with 6 additional codes.

6 codes are CPC-only extensions.

Note: 4 CPC extensions are marked as secondary classification only.

IPC defines codes here since 2000.

Child Classifications

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  • G01N 2021/8924 2nd only CPC only CPC only
  • G01N 2021/8925 2nd only CPC only CPC only
  • G01N 2021/8927 2nd only CPC only CPC only
  • G01N 2021/8928 2nd only CPC only CPC only
  • G01N 21/8921 CPC only CPC only
  • G01N 21/8922 CPC only CPC only
  • G01N 21/894 Pinholes since 2000 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