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IPC Subgroup
H01H 71/24

Electromagnetic mechanisms

Introduced: September 1968

Last revised: January 2006

Full Title

Details of the protective switches or relays covered by groups > Operating or release mechanisms > Automatic release mechanisms with or without manual release > Electromagnetic mechanisms

Classification Context

Section:
ELECTRICITY
Class:
ELECTRIC ELEMENTS
Subclass:
ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES

7 direct subcodes

Child Classifications

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  • H01H 71/26 with windings acting in opposition
  • H01H 71/28 with windings acting in conjunction
  • H01H 71/3 having additional short-circuited winding
  • H01H 71/32 having permanently magnetised part
  • H01H 71/34 having two or more armatures controlled by a common winding
  • H01H 71/36 frequency selective
  • H01H 71/38 wherein the magnet coil also acts as arc blow-out device

Top Applicants

Top 10 applicants by patent filingsfor class H01, 2013–2023, worldwide · Source: EPO PATSTAT

  1. TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY TW 43,574
  2. SAMSUNG ELECTRONICS COMPANY KR 42,206
  3. LG CHEM KR 21,383
  4. APPLIED MATERIALS US 20,441
  5. LG ENERGY SOLUTION KR 20,279
  6. SAMSUNG DISPLAY KR 19,725
  7. CHINESE ACADEMY OF SCIENCES 19,400
  8. TOYOTA MOTOR CORPORATION 18,819
  9. SGCC(STATE GRID CORPORATION OF CHINA) 18,082
  10. TOKYO ELECTRON JP 17,634