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DIFF Subgroup
H02M 7/53846

Control circuits

Introduced: January 2007

Full Title

Full titles differ between systems:

IPC:

Conversion of AC power input into DC power output; Conversion of DC power input into AC power output > Conversion of DC power input into AC power output without possibility of reversal > by static converters > using discharge tubes with control electrode or semiconductor devices with control electrode > using devices of a triode or transistor type requiring continuous application of a control signal > using semiconductor devices only, e.g. single switched pulse inverters > in a self-oscillating arrangement > Control circuits

CPC:

Conversion of AC power input into DC power output; Conversion of DC power input into AC power output > Conversion of DC power input into AC power output without possibility of reversal > by static converters > using discharge tubes with control electrode or semiconductor devices with control electrode > using devices of a triode or transistor type requiring continuous application of a control signal > using semiconductor devices only, e.g. single switched pulse inverters > in a self-oscillating arrangement (H02M7/538 takes precedence) > Control circuits

Of 4 combined children, 2 exist in both systems.

2 codes are CPC-only extensions.

IPC defines codes here since 2007.

Child Classifications

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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