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CPC Subclass Not Allocatable
H01H

ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES (contact cables H01B7/10; electrolytic self-interrupters H01G9/18; emergency protective circuit arrangements H02H; switching by electronic means without contact-making H03K17/00)

Description

H01H covers electric switches, relays, selectors, and emergency protective devices—the fundamental electromechanical and electromagnetic components used to control, interrupt, or route electrical circuits. This subclass includes mechanical switches (push-button, toggle, rotary), electromagnetic relays, contactors, solenoid-operated devices, and circuit protection equipment such as thermal and magnetic overload devices. Applications span industrial control systems, household appliances, automotive electrical systems, and power distribution networks. Related switching technologies implemented in semiconductor form (transistors, diodes) are classified separately under H01L.

68 direct subcodes

Child Classifications

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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