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CPC Main Group Additional Only
Y04S 10/00

Systems supporting electrical power generation, transmission or distribution

9 direct subcodes

Child Classifications

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  • Y04S 10/14 Energy storage units
  • Y04S 10/16 Electric power substations
  • Y04S 10/18 using switches, relays or circuit breakers, e.g. intelligent electronic devices [IED]
  • Y04S 10/20 using protection elements, arrangements or systems
  • Y04S 10/22 Flexible AC transmission systems [FACTS] or power factor or reactive power compensating or correcting units
  • Y04S 10/30 State monitoring, e.g. fault, temperature monitoring, insulator monitoring, corona discharge
  • Y04S 10/40 Display of information, e.g. of data or controls

Top Applicants

Top 10 applicants by patent filingsfor class Y04, 2013–2023, worldwide · Source: EPO PATSTAT

  1. SGCC(STATE GRID CORPORATION OF CHINA) 11,048
  2. GUANGDONG POWER GRID CORPORATION 3,187
  3. NORTH CHINA ELECTRIC POWER UNIVERSITY 1,200
  4. STATE GRID JIANGSU ELECTRIC POWER COMPANY 956
  5. STATE GRID SHANGHAI MUNICIPAL ELECTRIC POWER COMPANY 929
  6. SIEMENS DE 899
  7. STATE GRID ZHEJIANG ELECTRIC POWER COMPANY 794
  8. GUIZHOU POWER GRID CORPORATION 770
  9. SHENZHEN POWER SUPPLY BUREAU COMPANY 745
  10. STATE GRID FUJIAN ELECTRIC POWER COMPANY 720