CPC Subgroup
E04C 3/02 Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; (E04C3/38 takes precedence; for structures characterised by movable, separable, or collapsible parts E04B1/343; )
Full Title
Structural elongated elements designed for load-supporting (as building aids E04G) > Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; (E04C3/38 takes precedence; for structures characterised by movable, separable, or collapsible parts E04B1/343; )
7 direct subcodes
Child Classifications
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- E04C 3/04 of metal (E04C3/29 takes precedence; as reinforcing elements E04C5/06; manufacture B21)
- E04C 3/12 of wood, e.g. with reinforcements, with tensioning members (E04C3/292 takes precedence)
- E04C 3/20 of concrete or other stone-like material, e.g. with reinforcements or tensioning members (reinforcing elements E04C5/00)
- E04C 3/28 of materials not covered by groups E04C3/04 - E04C3/20
- E04C 3/29 built-up from parts of different 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