DIFF Subgroup
E04D 5/02 of materials impregnated with sealing substances, e.g. roofing felt
Introduced: September 1968
Full Title
Full titles differ between systems:
IPC:
Roof covering by making use of flexible material, e.g. supplied in roll form > of materials impregnated with sealing substances, e.g. roofing felt
CPC:
Roof covering by making use of flexible material, e.g. supplied in roll form (using stiff sheets E04D3/00; gravelling of flat roofs E04D7/00 ; built-up roofs E04D11/02) > of materials impregnated with sealing substances, e.g. roofing felt
No child classifications to compare. This is a leaf node in both IPC and CPC.