CPC Main Group
E04C 1/00 Building elements of block or other shape for the construction of parts of buildings (of relatively thin form E04C2/00; structural elongated elements designed for load-supporting E04C3/00, e.g. columns or pillars E04C3/30; manufacture or material of building bricks, stones, or the like B28, C03, C04; paving elements E01C; general building constructions E04B, e.g. walls E04B2/00, floors E04B5/00, roofs E04B7/00, ceilings E04B9/00; structural elements specially designed for built-in conduit shafts E04F17/00; ; special elements for building ovens or furnaces F24B, F27D)
Filing statistics
CPC E04C 1/00 belongs to the parent subclass E04C, which recorded 58,394 patent applications worldwide between 2013 and 2023. Annual filings grew from 3,956 in 2013 to 4,863 in 2023 (+23%), peaking at 6,403 applications in 2017. The most active applicants in class E04 are CHINA CONSTRUCTION EIGHTH ENGINEERING DIVISION (1,675 applications), CHINA MCC17 GROUP COMPANY (1,593 applications) and ZHEJIANG YASHA DECORATION COMPANY (1,551 applications).
Source: EPO PATSTAT, worldwide filings
4 direct subcodes
Child Classifications
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- E04C 1/39 characterised by special adaptations, e.g. serving for locating conduits, for forming soffits, cornices, or shelves, for fixing wall-plates or door-frames, for claustra
- E04C 1/40 built-up from parts of different materials, e.g. composed of layers of different materials or stones with filling material or with insulating inserts
- E04C 1/42 of glass or other transparent material
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