CPC Subgroup
E04C 3/04 of metal (E04C3/29 takes precedence; as reinforcing elements E04C5/06; manufacture B21)
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; ) > of metal (E04C3/29 takes precedence; as reinforcing elements E04C5/06; manufacture B21)
6 direct subcodes
Child Classifications
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- E04C 3/06 with substantially solid, i.e. unapertured, web (E04C3/10, E04C3/11 take precedence )
- E04C 3/08 with apertured web, e.g. with a web consisting of bar-like components; Honeycomb girders (E04C3/10, E04C3/11 take precedence)
- E04C 3/10 prestressed
- E04C 3/11 with non-parallel upper and lower edges, e.g. roof trusses (arched girders, portal frames E04C3/38)
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