H02J 4/25 for transfer of electric power between AC and DC networks, e.g. for supplying the DC section within a load from an AC mains system
Introduced: January 2026
Full Title
Circuit arrangements for mains or distribution networks not specified as AC or DC; Circuit arrangements for mains or distribution networks combining AC and DC sections or sub-networks > Networks integrating separated AC and DC power sections > for transfer of electric power between AC and DC networks, e.g. for supplying the DC section within a load from an AC mains system
Classification Context
- Section:
- ELECTRICITY
- Class:
- GENERATION, CONVERSION, OR DISTRIBUTION OF ELECTRIC POWER
- Subclass:
- ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
Filing statistics
IPC H02J 4/25 belongs to the parent subclass H02J, which recorded 623,631 patent applications worldwide between 2013 and 2023. Annual filings grew from 34,287 in 2013 to 78,393 in 2023 (+129%). The most active applicants in class H02 are SGCC(STATE GRID CORPORATION OF CHINA) (54,496 applications), MITSUBISHI ELECTRIC CORPORATION (10,495 applications) and TOYOTA MOTOR CORPORATION (9,464 applications).
Source: EPO PATSTAT, worldwide filings
Top Applicants
Top 10 applicants by patent filingsfor 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