G01N 27/90 using eddy currents
Full Title
Investigating or analysing materials by the use of electric, electrochemical, or magnetic means (G01N3/00 – G01N25/00 take precedence; measurement or testing of electric or magnetic variables or of electric or magnetic properties of materials G01R) > by investigating magnetic variables > for investigating the presence of flaws > using eddy currents
Filing statistics
CPC G01N 27/90 belongs to the parent subclass G01N, which recorded 1,076,242 patent applications worldwide between 2013 and 2023. Annual filings grew from 58,557 in 2013 to 108,067 in 2023 (+85%), peaking at 123,338 applications in 2020. 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
6 direct subcodes
Child Classifications
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- G01N 27/9013 Arrangements for scanning
- G01N 27/904 with two or more sensors
- G01N 27/9093 Arrangements for supporting the sensor; Combinations of eddy-current sensors and auxiliary arrangements for marking or for rejecting
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