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IPC Subgroup
E04B 1/342

Structures covering a large free area, whether open-sided or not, e.g. hangars, halls

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 covering a large free area, whether open-sided or not, e.g. hangars, halls

Classification Context

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

Filing statistics

IPC E04B 1/342 belongs to the parent subclass E04B, which recorded 407,239 patent applications worldwide between 2013 and 2023. Annual filings grew from 16,759 in 2013 to 51,677 in 2023 (+208%), peaking at 57,449 applications in 2020. The most active applicants in class E04 are CHINA CONSTRUCTION EIGHTH ENGINEERING DIVISION (6,575 applications), ZHEJIANG YASHA DECORATION COMPANY (4,488 applications) and SGCC(STATE GRID CORPORATION OF CHINA) (4,427 applications).

Source: EPO PATSTAT, worldwide filings

Related Keywords

buildings for storing AIRCRAFTEXHIBITION(S) hallsHALLS covering large free areasHANGARS covering large free area

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