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
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