DIFF Subgroup
G01N 29/4409 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) > Processing the detected response signal
Of 3 combined children, 0 exist in both systems.
3 codes are CPC-only extensions.