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PCE
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DIFF Subgroup
G01R 19/25

using digital measurement techniques

Introduced: January 1980

Full Title

Full titles differ between systems:

IPC:

Arrangements for measuring currents or voltages or for indicating presence or sign thereof > using digital measurement techniques

CPC:

Arrangements for measuring currents or voltages or for indicating presence or sign thereof (G01R5/00 takes precedence; for measuring bioelectric currents or voltages A61B5/24) > using digital measurement techniques

CPC subdivides this area 2x more granularly than IPC with 4 additional codes.

4 codes are CPC-only extensions.

IPC defines codes here since 1985.

Child Classifications

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  • G01R 19/2503 CPC only CPC only
  • G01R 19/2513 CPC only CPC only
  • G01R 19/2516 CPC only CPC only
  • G01R 19/252 using analogue/digital converters of the type with conversion of voltage or current into frequency and measuring of this frequency since 1985 IPC+CPC Available in IPC and CPC
  • G01R 19/255 using analogue/digital converters of the type with counting of pulses during a period of time proportional to voltage or current, delivered by a pulse generator with fixed frequency since 1985 IPC+CPC Available in IPC and CPC
  • G01R 19/257 using analogue/digital converters of the type with comparison of different reference values with the value of voltage or current, e.g. using step-by-step method since 1985 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