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IPC Subgroup
E04B 9/22

Connection of slabs, sheets or the like to the supporting construction

Introduced: January 1990

Last revised: January 2006

Full Title

Ceilings; Construction of ceilings, e.g. false ceilings; Ceiling construction with regard to insulation > Connection of slabs, sheets or the like to the supporting construction

Classification Context

Section:
FIXED CONSTRUCTIONS
Class:
BUILDING
Subclass:
GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS

2 direct subcodes

Child Classifications

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  • E04B 9/28 with the slabs, sheets or the like having grooves engaging with horizontal flanges of the supporting construction or accessory means connected thereto

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