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IPC Subgroup
H02K 33/04

wherein the frequency of operation is determined by the frequency of uninterrupted AC energisation

Introduced: September 1968

Last revised: January 2006

Full Title

Motors with reciprocating, oscillating or vibrating magnet, armature or coil system > with armatures moved one way by energisation of a single coil system and returned by mechanical force, e.g. by springs > wherein the frequency of operation is determined by the frequency of uninterrupted AC energisation

Classification Context

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

2 direct subcodes

Child Classifications

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  • H02K 33/06 with polarised armatures
  • H02K 33/08 with DC energisation superimposed on AC energisation

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