Full Title

Special arrangements or devices in connection with roof coverings; Roof drainage (ventilation tiles E04D1/30; ventilation slabs E04D3/40; internal channels E04F17/00) > Roof drainage; Drainage fittings in flat roofs, (gutter tiles E04D1/30; gutter slabs E04D3/40; street gullies E03F5/04) > Devices or arrangements for removing snow, ice or debris from gutters or for preventing accumulation thereof