DIFF Subgroup
H02K 21/28 with armatures rotating within the magnets
Introduced: September 1968
Full Title
Synchronous motors having permanent magnets; Synchronous generators having permanent magnets > with rotating armatures and stationary magnets > with armatures rotating within the magnets
IPC and CPC are identically structured here. All 4 subcodes exist in both systems.
3 shared codes have differing titles between IPC and CPC.
Child Classifications
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- H02K 21/30 having annular armature cores with salient poles (with homopolar co-operation H02K21/36) IPC+CPC Available in IPC and CPC
- H02K 21/32 having horse-shoe magnets (with homopolar co-operation H02K21/36) +1 CPC IPC+CPC Available in IPC and CPC
- H02K 21/34 having bell-shaped or bar-shaped magnets, e.g. for cycle lighting (with homopolar co-operation H02K21/36) IPC+CPC Available in IPC and CPC
Top Applicants
Top Applicants (IPC)
Class H02,2013–2023, worldwide · Source: EPO PATSTAT
- SGCC(STATE GRID CORPORATION OF CHINA) 54,496
- MITSUBISHI ELECTRIC CORPORATION JP 10,495
- TOYOTA MOTOR CORPORATION 9,464
- GUANGDONG POWER GRID CORPORATION 9,339
- ROBERT BOSCH DE 8,226
- SIEMENS DE 8,218
- DENSO CORPORATION 7,063
- MITSUBISHI ELECTRIC CORPORATION 6,619
- SAMSUNG ELECTRONICS COMPANY KR 5,826
- GREE ELECTRIC APPLIANCES 5,094
Top Applicants (CPC)
Class H02,2013–2023, worldwide · Source: EPO PATSTAT
- SGCC(STATE GRID CORPORATION OF CHINA) 24,515
- MITSUBISHI ELECTRIC CORPORATION JP 11,346
- SIEMENS DE 9,026
- ROBERT BOSCH DE 9,005
- SAMSUNG ELECTRONICS COMPANY KR 6,729
- GUANGDONG POWER GRID CORPORATION 5,740
- DENSO CORPORATION JP 5,077
- LG ELECTRONICS KR 5,041
- LG INNOTEK COMPANY KR 4,442
- TOYOTA MOTOR CORPORATION 4,349