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DIFF Subgroup
F23Q 23/08

Testing of components (of sparking plugs H01T13/58, F02P17/12)

Introduced: September 1968

Title

Titles differ between systems:

IPC: Testing of components

CPC: Testing of components (of sparking plugs H01T13/58, F02P17/12)

Full Title

Full titles differ between systems:

IPC:

Testing of ignition installations > Testing of components

CPC:

Testing of ignition installations (peculiar to internal-combustion engines F02P17/00) > Testing of components (of sparking plugs H01T13/58, F02P17/12)

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

Child Classifications

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  • F23Q 23/10 electrically IPC+CPC Available in IPC and CPC

Top Applicants

Top Applicants (IPC)

Class F23,2013–2023, worldwide · Source: EPO PATSTAT

  1. GE (GENERAL ELECTRIC COMPANY) US 2,124
  2. XIAN THERMAL POWER RESEARCH INSTITUTE COMPANY 1,369
  3. NINGBO FOTILE KITCHENWARE COMPANY 1,363
  4. SIEMENS DE 997
  5. UNITED TECHNOLOGIES CORPORATION (UTC) US 937
  6. GE (GENERAL ELECTRIC COMPANY) 898
  7. VATTI 815
  8. CHINESE ACADEMY OF SCIENCES 719
  9. RINNAI COMPANY 708
  10. MITSUBISHI HITACHI POWER SYSTEMS 670

Top Applicants (CPC)

Class F23,2013–2023, worldwide · Source: EPO PATSTAT

  1. GE (GENERAL ELECTRIC COMPANY) US 2,581
  2. UNITED TECHNOLOGIES CORPORATION (UTC) US 1,180
  3. SIEMENS DE 1,157
  4. GE (GENERAL ELECTRIC COMPANY) 994
  5. XIAN THERMAL POWER RESEARCH INSTITUTE COMPANY 769
  6. MITSUBISHI HEAVY INDUSTRIES JP 701
  7. MITSUBISHI HITACHI POWER SYSTEMS JP 695
  8. RAYTHEON TECHNOLOGIES CORPORATION US 587
  9. NINGBO FOTILE KITCHENWARE COMPANY 543
  10. GENERAL ELECTRIC TECHNOLOGY CH 490