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CPC Main Group
H01H 51/00

Electromagnetic relays (relays using the dynamo-electric effect H01H53/00)

9 direct subcodes

Child Classifications

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  • H01H 51/01 Relays in which the armature is maintained in one position by a permanent magnet and freed by energisation of a coil producing an opposing magnetic field
  • H01H 51/27 Relays with armature having two stable magnetic states and operated by change from one state to the other
  • H01H 51/29 Relays having armature, contacts, and operating coil within a sealed casing (H01H51/27 takes precedence)

Top Applicants

Top 10 applicants by patent filingsfor 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