IPC Main Group
E04C 5/00 Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
Introduced: September 1968
Last revised: January 2006
Classification Context
- Section:
- FIXED CONSTRUCTIONS
- Class:
- BUILDING
- Subclass:
- STRUCTURAL ELEMENTS; BUILDING MATERIALS
Filing statistics
IPC E04C 5/00 belongs to the parent subclass E04C, which recorded 124,823 patent applications worldwide between 2013 and 2023. Annual filings grew from 6,510 in 2013 to 15,263 in 2023 (+134%), peaking at 15,370 applications in 2021. The most active applicants in class E04 are CHINA CONSTRUCTION EIGHTH ENGINEERING DIVISION (6,575 applications), ZHEJIANG YASHA DECORATION COMPANY (4,488 applications) and SGCC(STATE GRID CORPORATION OF CHINA) (4,427 applications).
Source: EPO PATSTAT, worldwide filings
Related Keywords
REINFORCING elements for concrete in building
5 direct subcodes
Child Classifications
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- E04C 5/01 Reinforcing elements of metal, e.g. with non-structural coatings
- E04C 5/07 Reinforcing elements of material other than metal, e.g. of glass, of plastics, or not exclusively made of metal
- E04C 5/08 Members specially adapted to be used in prestressed constructions
- E04C 5/12 Anchoring devices
- E04C 5/16 Auxiliary parts for reinforcements, e.g. connectors, spacers, stirrups
Top Applicants
Top 10 applicants by patent filingsfor class E04, 2013–2023, worldwide · Source: EPO PATSTAT
- CHINA CONSTRUCTION EIGHTH ENGINEERING DIVISION 6,575
- ZHEJIANG YASHA DECORATION COMPANY 4,488
- SGCC(STATE GRID CORPORATION OF CHINA) 4,427
- CHINA CONSTRUCTION SECOND ENGINEERING BUREAU 4,352
- CHINA MCC17 GROUP COMPANY 3,122
- GOLD MANTIS FINE DECORATION TECHNOLOGY (SUZHOU) COMPANY 2,605
- SHENYANG JIANZHU UNIVERSITY 2,420
- CHINA CONSTRUCTION SEVENTH ENGINEERING DIVISION COMPANY 2,284
- CHINA CONSTRUCTION FIFTH ENGINEERING DIVISION CORPORATION 2,008
- CHINA CONSTRUCTION FIRST BUILDING (GROUP) CORPORATION 1,967