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PCE
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CPC Subgroup
H02P 7/34

using Ward-Leonard arrangements

Full Title

Arrangements for regulating or controlling the speed or torque of electric DC motors > for regulating or controlling an individual DC dynamo-electric motor by varying field or armature current > by master control with auxiliary power > using Ward-Leonard arrangements

2 direct subcodes

Child Classifications

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  • H02P 7/343 in which both generator and motor fields are controlled
  • H02P 7/347 in which only the generator field is controlled

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