CPC Main Group
E04D 13/00 Special arrangements or devices in connection with roof coverings; Roof drainage (ventilation tiles E04D1/30; ventilation slabs E04D3/40; internal channels E04F17/00)
13 direct subcodes
Child Classifications
Navigate with arrow keys, Enter to open
- E04D 13/02 Roof-covering aspects of dormer windows (E04D13/14 takes precedence; structures therefor E04B7/18)
- E04D 13/03 Sky-lights; Domes; Ventilating sky-lights (E04D13/14 takes precedence; structures therefor, E04B7/18; )
- E04D 13/04 Roof drainage; Drainage fittings in flat roofs, (gutter tiles E04D1/30; gutter slabs E04D3/40; street gullies E03F5/04)
- E04D 13/10 Snow traps
- E04D 13/12 Devices or arrangements allowing walking on the roof or in the gutter
- E04D 13/14 Junctions of roof sheathings to chimneys or other parts extending above the roof
- E04D 13/15 Trimming strips; Edge strips; Fascias;
- E04D 13/16 Insulating devices or arrangements in so far as the roof covering is concerned,
- E04D 13/17 Ventilation of roof coverings not otherwise provided for (ventilation of rooms or spaces F24F)
Top Applicants
Top 10 applicants by patent filingsfor class E04, 2013–2023, worldwide · Source: EPO PATSTAT
- CHINA CONSTRUCTION EIGHTH ENGINEERING DIVISION 1,675
- CHINA MCC17 GROUP COMPANY 1,593
- ZHEJIANG YASHA DECORATION COMPANY 1,551
- SGCC(STATE GRID CORPORATION OF CHINA) 1,297
- GOLD MANTIS FINE DECORATION TECHNOLOGY (SUZHOU) COMPANY 1,212
- SHENYANG JIANZHU UNIVERSITY 926
- VAELINGE INNOVATION SE 901
- CHINA MCC5 GROUP CORPORATION 894
- VKR HOLDING DK 854
- SHANGHAI BAOYE GROUP CORPORATION 753