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DIFF Subgroup
H02K 15/021

Magnetic cores

Introduced: January 2025

Full Title

Processes or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines > of stator or rotor bodies > Magnetic cores

IPC and CPC are identically structured here. All 8 subcodes exist in both systems.

IPC defines codes here since 2025.

Child Classifications

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  • H02K 15/023 Cage rotors since 2025 IPC+CPC Available in IPC and CPC
  • H02K 15/025 characterised by skewed structures in cores since 2025 IPC+CPC Available in IPC and CPC
  • H02K 15/026 Wound cores since 2025 IPC+CPC Available in IPC and CPC
  • H02K 15/027 Punching the cores since 2025 IPC+CPC Available in IPC and CPC
  • H02K 15/0273 Laminating the cores since 2025 IPC+CPC Available in IPC and CPC
  • H02K 15/0275 Annealing the cores since 2025 IPC+CPC Available in IPC and CPC
  • H02K 15/0278 Welding the cores since 2025 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