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PCE
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IPC Subgroup
E04B 5/23

with stiffening ribs or other beam-like formations wholly or partly prefabricated

Introduced: September 1968

Last revised: January 2006

Full Title

Floors; Floor construction with regard to insulation; Connections specially adapted therefor > Load-carrying floor structures wholly or partly cast or similarly formed > Floor structures partly formed > with stiffening ribs or other beam-like formations wholly or partly prefabricated

Classification Context

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

3 direct subcodes

Child Classifications

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  • E04B 5/26 with filling members between the beams
  • E04B 5/28 Cross-ribbed floors
  • E04B 5/29 the prefabricated parts of the beams consisting wholly of metal

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