DIFF Subgroup
F24F 8/99 for treating air sourced from urban areas, e.g. from streets
Introduced: January 2021
Full Title
Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying > specially adapted for specific purposes > for treating air sourced from urban areas, e.g. from streets
No child classifications to compare. This is a leaf node in both IPC and CPC.