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IPC Subgroup
H01G 7/02

Electrets, i.e. having a permanently-polarised dielectric

Introduced: September 1968

Last revised: January 2006

Full Title

Capacitors in which the capacitance is varied by non-mechanical means; Processes of their manufacture > Electrets, i.e. having a permanently-polarised dielectric

Classification Context

Section:
ELECTRICITY
Class:
ELECTRIC ELEMENTS
Subclass:
CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE

Filing statistics

IPC H01G 7/02 belongs to the parent subclass H01G, which recorded 104,471 patent applications worldwide between 2013 and 2023. Annual filings grew from 8,098 in 2013 to 9,684 in 2023 (+20%), peaking at 10,482 applications in 2020. The most active applicants in class H01 are TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY (43,574 applications), SAMSUNG ELECTRONICS COMPANY (42,206 applications) and LG CHEM (21,383 applications).

Source: EPO PATSTAT, worldwide filings

Related Keywords

ELECTRETS

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