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PCE
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DIFF Subgroup
G01N 29/036

by measuring frequency or resonance of acoustic waves

Introduced: January 2006

Full Title

Full titles differ between systems:

IPC:

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 > Analysing fluids > by measuring frequency or resonance of acoustic waves

CPC:

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 ) > by measuring frequency or resonance of acoustic waves

No child classifications to compare. This is a leaf node in both IPC and CPC.