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PCE
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DIFF Main Group
G05D 9/00

Level control, e.g. controlling quantity of material stored in vessel

Introduced: September 1968

Additional Content IPC

Controlling the liquid level in sedimentation arrangements Ink level control devices Controlling water level for boilers Controlling level of liquid in liquid pool electrodes in electric discharge tubes or lamps ,

IPC and CPC are identically structured here. All 3 subcodes exist in both systems.

Child Classifications

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  • G05D 9/02 without auxiliary power IPC+CPC Available in IPC and CPC
  • G05D 9/04 with auxiliary non-electric power IPC+CPC Available in IPC and CPC
  • G05D 9/12 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