IPC Main Group
E04B 9/00 Ceilings; Construction of ceilings, e.g. false ceilings; Ceiling construction with regard to insulation
Introduced: January 1990
Last revised: January 2006
Classification Context
- Section:
- FIXED CONSTRUCTIONS
- Class:
- BUILDING
- Subclass:
- GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
Related Keywords
CEILING(S) as parts of building structures
8 direct subcodes
Child Classifications
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- E04B 9/02 having means for ventilation or vapour discharge
- E04B 9/04 comprising slabs, sheets or the like
- E04B 9/06 characterised by constructional features of the supporting construction
- E04B 9/18 Means for suspending the supporting construction
- E04B 9/22 Connection of slabs, sheets or the like to the supporting construction
- E04B 9/3 characterised by edge details of the ceiling, e.g. securing to an adjacent wall
- E04B 9/32 Translucent ceilings, i.e. permitting both the transmission and diffusion of light
- E04B 9/34 Open-work ceilings, e.g. lattice type
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