Skip to content
Search Classifications
Search for IPC and CPC classification codes or keywords
IPC Subgroup
E04C 3/294

of concrete combined with a girder-like structure extending laterally outside the element

Introduced: September 1968

Last revised: January 2006

Full Title

Structural elongated elements designed for load-supporting > Joists; Girders, trusses, or truss-like structures, e.g. prefabricated; Lintels; Transoms > built-up from parts of different materials > the materials being steel and concrete > of concrete combined with a girder-like structure extending laterally outside the element

Classification Context

Section:
FIXED CONSTRUCTIONS
Class:
BUILDING
Subclass:
STRUCTURAL ELEMENTS; BUILDING MATERIALS

Top Applicants

Top 10 applicants by patent filingsfor class E04, 2013–2023, worldwide · Source: EPO PATSTAT

  1. CHINA CONSTRUCTION EIGHTH ENGINEERING DIVISION 6,575
  2. ZHEJIANG YASHA DECORATION COMPANY 4,488
  3. SGCC(STATE GRID CORPORATION OF CHINA) 4,427
  4. CHINA CONSTRUCTION SECOND ENGINEERING BUREAU 4,352
  5. CHINA MCC17 GROUP COMPANY 3,122
  6. GOLD MANTIS FINE DECORATION TECHNOLOGY (SUZHOU) COMPANY 2,605
  7. SHENYANG JIANZHU UNIVERSITY 2,420
  8. CHINA CONSTRUCTION SEVENTH ENGINEERING DIVISION COMPANY 2,284
  9. CHINA CONSTRUCTION FIFTH ENGINEERING DIVISION CORPORATION 2,008
  10. CHINA CONSTRUCTION FIRST BUILDING (GROUP) CORPORATION 1,967