Skip to content
PCE
Search Classifications
Search for IPC and CPC classification codes or keywords
DIFF Main Group
H02J 15/00

Systems for storing electric energy specially adapted for power networks

Introduced: July 1974

IPC and CPC are identically structured here. All 5 subcodes exist in both systems.

IPC defines codes here since 2026.

Child Classifications

Navigate with arrow keys, Enter to open

  • H02J 15/10 using storage of hydraulic energy since 2026 IPC+CPC Available in IPC and CPC
  • H02J 15/20 using storage of pneumatic energy, e.g. compressed air energy storage [CAES] since 2026 IPC+CPC Available in IPC and CPC
  • H02J 15/30 using storage of inertial or mechanical energy, e.g. using flywheels since 2026 IPC+CPC Available in IPC and CPC
  • H02J 15/40 using coils, e.g. superconductive magnetic energy storage [SMES] systems since 2026 IPC+CPC Available in IPC and CPC
  • H02J 15/50 using stored hydrogen since 2026 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