DIFF Subgroup
E21F 17/103 Dams, e.g. for ventilation
Introduced: January 1995
Full Title
Full titles differ between systems:
IPC:
Methods or devices for use in mines or tunnels, not covered elsewhere > Dams, e.g. for ventilation
CPC:
Methods or devices for use in mines or tunnels, not covered elsewhere (mine lighting F21, H05B) > Dams, e.g. for ventilation
IPC and CPC are identically structured here. All 2 subcodes exist in both systems.
Child Classifications
Navigate with arrow keys, Enter to open