IPC Main Group
H01G 9/00 Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
Introduced: September 1968
Last revised: January 2006
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 9/00 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
electrolytic SWITCHING devices
10 direct subcodes
Child Classifications
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- H01G 9/004 Details
- H01G 9/145 Liquid electrolytic capacitors
- H01G 9/15 Solid electrolytic capacitors
- H01G 9/16 specially adapted for use as rectifiers or detectors
- H01G 9/18 Self-interrupters
- H01G 9/2 Light-sensitive devices
- H01G 9/21 Temperature-sensitive devices
- H01G 9/22 Devices using combined reduction and oxidation, e.g. redox arrangement or solion
- H01G 9/26 Structural combinations of electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices with each other
- H01G 9/28 Structural combinations of electrolytic capacitors, rectifiers, detectors, switching devices with other electric components not covered by this subclass
Top Applicants
Top 10 applicants by patent filingsfor class H01, 2013–2023, worldwide · Source: EPO PATSTAT
- TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY TW 43,574
- SAMSUNG ELECTRONICS COMPANY KR 42,206
- LG CHEM KR 21,383
- APPLIED MATERIALS US 20,441
- LG ENERGY SOLUTION KR 20,279
- SAMSUNG DISPLAY KR 19,725
- CHINESE ACADEMY OF SCIENCES 19,400
- TOYOTA MOTOR CORPORATION 18,819
- SGCC(STATE GRID CORPORATION OF CHINA) 18,082
- TOKYO ELECTRON JP 17,634