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CPC Subgroup
H02K 23/26

characterised by the armature windings

Full Title

DC commutator motors or generators having mechanical commutator; Universal AC/DC commutator motors > characterised by the armature windings

Filing statistics

CPC H02K 23/26 belongs to the parent subclass H02K, which recorded 252,453 patent applications worldwide between 2013 and 2023. Annual filings grew from 14,359 in 2013 to 24,242 in 2023 (+69%), peaking at 29,510 applications in 2020. The most active applicants in class H02 are SGCC(STATE GRID CORPORATION OF CHINA) (24,515 applications), MITSUBISHI ELECTRIC CORPORATION (11,346 applications) and SIEMENS (9,026 applications).

Source: EPO PATSTAT, worldwide filings

6 direct subcodes

Child Classifications

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  • H02K 23/28 having open windings, i.e. not closed within the armatures
  • H02K 23/30 having lap or loop windings
  • H02K 23/32 having wave or undulating windings
  • H02K 23/34 having mixed windings
  • H02K 23/36 having two or more windings; having two or more commutators; having two or more stators
  • H02K 23/38 having winding or connection for improving commutation, e.g. equipotential connection

Top Applicants

Top 10 applicants by patent filingsfor 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