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DIFF Subgroup
H02K 23/40

characterised by the arrangement of the magnet circuits

Introduced: September 1968

Full Title

DC commutator motors or generators having mechanical commutator; Universal AC/DC commutator motors > characterised by the arrangement of the magnet circuits

Of 5 combined children, 4 exist in both systems.

1 codes are CPC-only extensions.

Child Classifications

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  • H02K 23/405 CPC only CPC only
  • H02K 23/42 having split poles, i.e. zones for varying reluctance by gaps in poles or by poles with different spacing of the air gap IPC+CPC Available in IPC and CPC
  • H02K 23/44 having movable, e.g. turnable, iron parts IPC+CPC Available in IPC and CPC
  • H02K 23/46 having stationary shunts, i.e. magnetic cross flux IPC+CPC Available in IPC and CPC
  • H02K 23/48 having adjustable armatures 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