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IPC Main Group
H02K 27/00

AC commutator motors or generators having mechanical commutator

Introduced: September 1968

Last revised: January 2006

Classification Context

Section:
ELECTRICITY
Class:
GENERATION, CONVERSION, OR DISTRIBUTION OF ELECTRIC POWER
Subclass:
DYNAMO-ELECTRIC MACHINES

9 direct subcodes

Child Classifications

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  • H02K 27/02 characterised by the armature winding
  • H02K 27/2 Structural association with a speed regulating device
  • H02K 27/22 having means for improving commutation, e.g. auxiliary fields, double windings, double brushes
  • H02K 27/24 having two or more commutators
  • H02K 27/26 having disc armature
  • H02K 27/28 Structural association with auxiliary electric devices influencing the characteristic of the machine or controlling the machine
  • H02K 27/3 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