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PCE
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DIFF Subgroup
H02P 9/16

due to variation of ohmic resistance in field circuit, using resistances switched in or out of circuit step by step

Introduced: September 1968

Full Title

Full titles differ between systems:

IPC:

Arrangements for controlling electric generators for the purpose of obtaining a desired output > by variation of field > due to variation of ohmic resistance in field circuit, using resistances switched in or out of circuit step by step

CPC:

Arrangements for controlling electric generators for the purpose of obtaining a desired output > by variation of field (H02P9/08, H02P9/10 take precedence) > due to variation of ohmic resistance in field circuit, using resistances switched in or out of circuit step by step

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

Child Classifications

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  • H02P 9/18 the switching being caused by a servomotor, measuring instrument, or relay IPC+CPC Available in IPC and CPC

Top Applicants

Top Applicants (IPC)

Class H02,2013–2023, worldwide · Source: EPO PATSTAT

  1. SGCC(STATE GRID CORPORATION OF CHINA) 54,496
  2. MITSUBISHI ELECTRIC CORPORATION JP 10,495
  3. TOYOTA MOTOR CORPORATION 9,464
  4. GUANGDONG POWER GRID CORPORATION 9,339
  5. ROBERT BOSCH DE 8,226
  6. SIEMENS DE 8,218
  7. DENSO CORPORATION 7,063
  8. MITSUBISHI ELECTRIC CORPORATION 6,619
  9. SAMSUNG ELECTRONICS COMPANY KR 5,826
  10. GREE ELECTRIC APPLIANCES 5,094

Top Applicants (CPC)

Class H02,2013–2023, worldwide · Source: EPO PATSTAT

  1. SGCC(STATE GRID CORPORATION OF CHINA) 24,515
  2. MITSUBISHI ELECTRIC CORPORATION JP 11,346
  3. SIEMENS DE 9,026
  4. ROBERT BOSCH DE 9,005
  5. SAMSUNG ELECTRONICS COMPANY KR 6,729
  6. GUANGDONG POWER GRID CORPORATION 5,740
  7. DENSO CORPORATION JP 5,077
  8. LG ELECTRONICS KR 5,041
  9. LG INNOTEK COMPANY KR 4,442
  10. TOYOTA MOTOR CORPORATION 4,349