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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 23/5 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

  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