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PCE
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Search for IPC and CPC classification codes or keywords
DIFF Subgroup
G01J 1/24

using electric radiation detectors

Introduced: September 1968

Full Title

Full titles differ between systems:

IPC:

Photometry, e.g. photographic exposure meter > by comparison with reference light or electric value > intensity of the measured or reference value being varied to equalise their effects at the detector, e.g. by varying incidence angle > using a variable element in the light-path, e.g. filter, polarising means > using electric radiation detectors

CPC:

Photometry, e.g. photographic exposure meter (spectrophotometry G01J3/00; specially adapted for radiation pyrometry G01J5/00 ) > by comparison with reference light or electric value > intensity of the measured or reference value being varied to equalise their effects at the detectors, e.g. by varying incidence angle > using a variable element in the light-path, e.g. filter, polarising means (G01J1/34 takes precedence) > using electric radiation detectors

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

3 codes are CPC-only extensions.

Note: 3 CPC extensions are marked as secondary classification only.

1 shared codes have differing titles between IPC and CPC.

Child Classifications

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  • G01J 1/26 adapted for automatic variation of the measured or reference value (regulation of light intensity G05D25/00) IPC+CPC Available in IPC and CPC
  • G01J 2001/242 2nd only CPC only CPC only
  • G01J 2001/245 2nd only CPC only CPC only
  • G01J 2001/247 2nd only CPC only CPC only

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