IPC Main Group
G01R 21/00 Arrangements for measuring electric power or power factor
Introduced: September 1968
Last revised: January 2006
Classification Context
- Section:
- PHYSICS
- Class:
- MEASURING; TESTING
- Subclass:
- MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
Filing statistics
IPC G01R 21/00 belongs to the parent subclass G01R, which recorded 598,083 patent applications worldwide between 2013 and 2023. Annual filings grew from 34,721 in 2013 to 76,517 in 2023 (+120%). The most active applicants in class G01 are SGCC(STATE GRID CORPORATION OF CHINA) (41,447 applications), CHINESE ACADEMY OF SCIENCES (32,952 applications) and ROBERT BOSCH (16,470 applications).
Source: EPO PATSTAT, worldwide filings
Related Keywords
measuring electric POWER
8 direct subcodes
Child Classifications
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- G01R 21/01 in circuits having distributed constants
- G01R 21/02 by thermal methods
- G01R 21/06 by measuring current and voltage
- G01R 21/08 by using galvanomagnetic-effect devices, e.g. Hall-effect devices
- G01R 21/1 by using square-law characteristics of circuit elements, e.g. diodes, to measure power absorbed by loads of known impedance
- G01R 21/127 by using pulse modulation
- G01R 21/133 by using digital technique
- G01R 21/14 Compensating for temperature change
Top Applicants
Top 10 applicants by patent filingsfor class G01, 2013–2023, worldwide · Source: EPO PATSTAT
- SGCC(STATE GRID CORPORATION OF CHINA) 41,447
- CHINESE ACADEMY OF SCIENCES 32,952
- ROBERT BOSCH DE 16,470
- SAMSUNG ELECTRONICS COMPANY KR 10,052
- SINOPEC (CHINA PETROCHEMICAL CORPORATION) 9,573
- ZHEJIANG UNIVERSITY 9,529
- GUANGDONG POWER GRID CORPORATION 8,615
- TSINGHUA UNIVERSITY 7,805
- HALLIBURTON ENERGY SERVICES GROUP US 7,796
- QUALCOMM US 7,171