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DIFF Main Group
G05D 21/00

Control of chemical or physico-chemical variables, e.g. pH value

Introduced: September 1968

Title

Titles differ between systems:

IPC: Control of chemical or physico-chemical variables, e.g. pH-value

CPC: Control of chemical or physico-chemical variables, e.g. pH value

Full Title

Full titles differ between systems:

IPC:

Control of chemical or physico-chemical variables, e.g. pH-value

CPC:

Control of chemical or physico-chemical variables, e.g. pH value

Additional Content IPC

Controlling density in sedimentation arrangements Controlling separation of gases or vapours by gas-analysis apparatus Control of fluid composition, e.g. gradient, of fluid carrier in chemical analysis

IPC and CPC are identically structured here. All 1 subcodes exist in both systems.

Child Classifications

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  • G05D 21/02 characterised by the use of electric means IPC+CPC Available in IPC and CPC

Top Applicants

Top Applicants (IPC)

Class G05,2013–2023, worldwide · Source: EPO PATSTAT

  1. SIEMENS DE 4,725
  2. SGCC(STATE GRID CORPORATION OF CHINA) 4,571
  3. FANUC JP 4,233
  4. MITSUBISHI ELECTRIC CORPORATION JP 3,143
  5. FANUC 2,981
  6. ROBERT BOSCH DE 2,813
  7. CHINESE ACADEMY OF SCIENCES 2,500
  8. LG ELECTRONICS KR 2,182
  9. OMRON CORPORATION JP 2,036
  10. SAMSUNG ELECTRONICS COMPANY KR 1,981

Top Applicants (CPC)

Class G05,2013–2023, worldwide · Source: EPO PATSTAT

  1. FANUC JP 6,367
  2. SIEMENS DE 5,963
  3. FANUC 4,535
  4. MITSUBISHI ELECTRIC CORPORATION JP 4,201
  5. ROBERT BOSCH DE 4,010
  6. LG ELECTRONICS KR 3,802
  7. SAMSUNG ELECTRONICS COMPANY KR 3,143
  8. FORD GLOBAL TECHNOLOGIES US 2,889
  9. TOYOTA MOTOR CORPORATION 2,778
  10. OMRON CORPORATION JP 2,743