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CPC Subgroup
H02K 17/22

having rotors with windings connected to slip-rings

Full Title

Asynchronous induction motors; Asynchronous induction generators > Asynchronous induction motors > having rotors with windings connected to slip-rings

1 direct subcode

Child Classifications

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  • H02K 17/24 in which both stator and rotor are fed with AC

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