CPC Main Group
E04H 12/00 Towers; Masts or poles; Chimney stacks; Water-towers; Methods of erecting such structures (cooling towers E04H5/12; derricks for oil drilling E21B15/00)
Filing statistics
CPC E04H 12/00 belongs to the parent subclass E04H, which recorded 106,543 patent applications worldwide between 2013 and 2023. Annual filings grew from 5,454 in 2013 to 9,064 in 2023 (+66%), peaking at 13,368 applications in 2020. 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
13 direct subcodes
Child Classifications
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- E04H 12/02 Structures made of specified materials
- E04H 12/16 Prestressed structures
- E04H 12/18 movable or with movable sections, e.g. rotatable or telescopic
- E04H 12/20 Side-supporting means therefor, e.g. using guy ropes or struts
- E04H 12/22 Sockets or holders for poles or posts
- E04H 12/24 Cross arms
- E04H 12/26 Winding towers for mines
- E04H 12/28 Chimney stacks, e.g. free-standing, or similar ducts (chimneys as part of buildings E04F17/02)
- E04H 12/30 Water-towers
- E04H 12/32 Flagpoles
- E04H 12/34 Arrangements for erecting or lowering towers, masts, poles, chimney stacks, or the like
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