CPC Subgroup
G01R 17/10 AC or DC measuring bridges
Full Title
Measuring arrangements involving comparison with a reference value, e.g. bridge > AC or DC measuring bridges
Filing statistics
CPC G01R 17/10 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
5 direct subcodes
Child Classifications
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- G01R 17/12 using comparison of currents, e.g. bridges with differential current output
- G01R 17/14 with indication of measured value by calibrated null indicator, e.g. percent bridge, tolerance bridge (G01R17/12, G01R17/16 take precedence)
- G01R 17/16 with discharge tubes or semiconductor devices in one or more arms of the bridge, e.g. voltmeter using a difference amplifier
- G01R 17/18 with more than four branches
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