Connections for building structures in general

Introduced: September 1968

Full Title

Full titles differ between systems:

IPC:

Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs > Connections for building structures in general

CPC:

Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs (scaffolds, shutterings E04G; structures specially adapted for buildings for special purposes, general layout of buildings, e.g. modular co-ordination, E04H) > Connections for building structures in general

Of 8 combined children, 4 exist in both systems.

4 codes are CPC-only extensions.

Note: 1 CPC extensions are marked as secondary classification only.

1 shared codes have differing titles between IPC and CPC.

Child Classifications

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E04B 1/383 CPC only CPC only
E04B 1/388 +1 CPC CPC only CPC only
E04B 1/41 Connecting devices specially adapted for embedding in concrete or masonry ( spacers for cavity walls E04B2/30, E04B2/44; connectors for reinforcing elements E04C5/16; fastening frames to the border of openings E06B1/56) +6 CPC IPC+CPC Available in IPC and CPC
E04B 1/48 Dowels, i.e. members adapted to penetrate the surfaces of two parts and to take the shear stresses +2 CPC IPC+CPC Available in IPC and CPC
E04B 1/541 CPC only CPC only
E04B 1/58 of bar-shaped building elements +8 CPC IPC+CPC Available in IPC and CPC
E04B 1/61 of slab-shaped building elements with each other since 1990 +3 CPC IPC+CPC Available in IPC and CPC
E04B 2001/386 2nd only CPC only CPC only

Top Applicants

Top Applicants (IPC)

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

Top Applicants (CPC)

Class E04,2013–2023, worldwide · Source: EPO PATSTAT

CHINA CONSTRUCTION EIGHTH ENGINEERING DIVISION 1,675
CHINA MCC17 GROUP COMPANY 1,593
ZHEJIANG YASHA DECORATION COMPANY 1,551
SGCC(STATE GRID CORPORATION OF CHINA) 1,297
GOLD MANTIS FINE DECORATION TECHNOLOGY (SUZHOU) COMPANY 1,212
SHENYANG JIANZHU UNIVERSITY 926
VAELINGE INNOVATION SE 901
CHINA MCC5 GROUP CORPORATION 894
VKR HOLDING DK 854
SHANGHAI BAOYE GROUP CORPORATION 753