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PCE
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Search for IPC and CPC classification codes or keywords
DIFF Subgroup
H01H 71/24

Electromagnetic mechanisms

Introduced: September 1968

Full Title

Full titles differ between systems:

IPC:

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

CPC:

Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00 > Operating or release mechanisms > Automatic release mechanisms with or without manual release > Electromagnetic mechanisms

CPC subdivides this area 2x more granularly than IPC with 9 additional codes.

9 codes are CPC-only extensions.

Child Classifications

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  • H01H 2071/249 2nd only CPC only CPC only
  • H01H 71/2409 CPC only CPC only
  • H01H 71/2436 CPC only CPC only
  • H01H 71/2445 CPC only CPC only
  • H01H 71/2454 CPC only CPC only
  • H01H 71/2463 CPC only CPC only
  • H01H 71/2472 CPC only CPC only
  • H01H 71/2481 CPC only CPC only
  • H01H 71/26 with windings acting in opposition IPC+CPC Available in IPC and CPC
  • H01H 71/28 with windings acting in conjunction IPC+CPC Available in IPC and CPC
  • H01H 71/30 having additional short-circuited winding IPC+CPC Available in IPC and CPC
  • H01H 71/36 frequency selective IPC+CPC Available in IPC and CPC
  • H01H 71/38 wherein the magnet coil also acts as arc blow-out device IPC+CPC Available in IPC and CPC

Top Applicants

Top Applicants (IPC)

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

Top Applicants (CPC)

Class H01,2013–2023, worldwide · Source: EPO PATSTAT

  1. SAMSUNG ELECTRONICS COMPANY KR 37,897
  2. TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY TW 36,116
  3. APPLIED MATERIALS US 21,640
  4. LG ENERGY SOLUTION KR 20,770
  5. LG CHEM KR 19,835
  6. TOKYO ELECTRON JP 18,519
  7. ROBERT BOSCH DE 14,595
  8. INTEL CORPORATION US 13,580
  9. MURATA MANUFACTURING COMPANY JP 12,151
  10. SAMSUNG SDI COMPANY KR 12,080