DIFF Subgroup
G01F 1/661 using light
Introduced: January 2022
Full Title
Full titles differ between systems:
IPC:
Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow > by measuring frequency, phase shift or propagation time of electromagnetic or other waves, e.g. using ultrasonic flowmeters > using light
CPC:
Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow (measuring a proportion of the volume flow G01F5/00) > by measuring frequency, phase shift or propagation time of electromagnetic or other waves, e.g. using ultrasonic flowmeters > using light
No child classifications to compare. This is a leaf node in both IPC and CPC.