CPC Main Group
G01R 21/00 Arrangements for measuring electric power or power factor (G01R7/12 takes precedence)
Filing statistics
CPC G01R 21/00 belongs to the parent subclass G01R, which recorded 383,760 patent applications worldwide between 2013 and 2023. Annual filings grew from 19,870 in 2013 to 47,277 in 2023 (+138%). The most active applicants in class G01 are CHINESE ACADEMY OF SCIENCES (21,460 applications), ROBERT BOSCH (17,801 applications) and SGCC(STATE GRID CORPORATION OF CHINA) (17,347 applications).
Source: EPO PATSTAT, worldwide filings
11 direct subcodes
Child Classifications
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- G01R 21/01 in circuits having distributed constants (G01R21/04, G01R21/07, G01R21/09, G01R21/12 take precedence)
- G01R 21/02 by thermal methods
- G01R 21/06 by measuring current and voltage (G01R21/08 - G01R21/133 take precedence)
- G01R 21/08 by using galvanomagnetic-effect devices, e.g. Hall-effect devices
- G01R 21/10 by using square-law characteristics of circuit elements, e.g. diodes, to measure power absorbed by loads of known impedance (G01R21/02 takes precedence)
- G01R 21/127 by using pulse modulation (G01R21/133 takes precedence)
- 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
- CHINESE ACADEMY OF SCIENCES 21,460
- ROBERT BOSCH DE 17,801
- SGCC(STATE GRID CORPORATION OF CHINA) 17,347
- SAMSUNG ELECTRONICS COMPANY KR 13,192
- QUALCOMM US 9,900
- HALLIBURTON ENERGY SERVICES GROUP US 9,742
- PHILIPS ELECTRONICS NL 7,249
- MITSUBISHI ELECTRIC CORPORATION JP 6,503
- ZHEJIANG UNIVERSITY 6,414
- DENSO CORPORATION JP 6,382