IPC Subgroup
E04B 1/18 Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
Introduced: September 1968
Last revised: January 2006
Full Title
Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs > Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
Classification Context
- Section:
- FIXED CONSTRUCTIONS
- Class:
- BUILDING
- Subclass:
- GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
6 direct subcodes
Child Classifications
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- E04B 1/19 Three-dimensional [3D] framework structures
- E04B 1/2 the supporting parts consisting of concrete, e.g. reinforced concrete, or other stone-like material
- E04B 1/24 the supporting parts consisting of metal
- E04B 1/26 the supporting parts consisting of wood
- E04B 1/28 the supporting parts consisting of other material
- E04B 1/3 the supporting parts being composed of two or more materials; Composite steel and concrete constructions
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