CPC Subgroup
G01N 29/02 Analysing fluids (using acoustic emission techniques G01N29/14 )
Full Title
Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object (G01N3/00 - G01N27/00 take precedence) > Analysing fluids (using acoustic emission techniques G01N29/14 )
5 direct subcodes
Child Classifications
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- G01N 29/024 by measuring propagation velocity or propagation time of acoustic waves
- G01N 29/028 by measuring mechanical or acoustic impedance
- G01N 29/032 by measuring attenuation of acoustic waves
- G01N 29/036 by measuring frequency or resonance of acoustic waves
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