IPC Main Group
H02K 23/00 DC commutator motors or generators having mechanical commutator; Universal AC/DC commutator motors
Introduced: September 1968
Last revised: January 2006
Classification Context
- Section:
- ELECTRICITY
- Class:
- GENERATION, CONVERSION, OR DISTRIBUTION OF ELECTRIC POWER
- Subclass:
- DYNAMO-ELECTRIC MACHINES
Filing statistics
IPC H02K 23/00 belongs to the parent subclass H02K, which recorded 426,168 patent applications worldwide between 2013 and 2023. Annual filings grew from 23,896 in 2013 to 46,626 in 2023 (+95%), peaking at 54,100 applications in 2020. 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
13 direct subcodes
Child Classifications
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- H02K 23/02 characterised by arrangement for exciting
- H02K 23/26 characterised by the armature windings
- H02K 23/4 characterised by the arrangement of the magnet circuits
- H02K 23/5 Generators with two or more outputs
- H02K 23/52 Motors acting also as generators, e.g. starting motors used as generators for ignition or lighting
- H02K 23/54 Disc armature motors or generators
- H02K 23/56 Motors or generators having iron cores separated from armature winding
- H02K 23/58 Motors or generators without iron cores
- H02K 23/6 Motors or generators having rotating armatures and rotating excitation field
- H02K 23/62 Motors or generators with stationary armatures and rotating excitation field
- H02K 23/64 Motors specially adapted for running on DC or AC by choice
- H02K 23/66 Structural association with auxiliary electric devices influencing the characteristic of, or controlling, the machine, e.g. with impedances or switches
- H02K 23/68 Structural association with auxiliary mechanical devices, e.g. with clutches or brakes
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