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PCE
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DIFF Subgroup
E04D 3/361

by specially-profiled marginal portions of the slabs or sheets

Introduced: September 1968

Full Title

Full titles differ between systems:

IPC:

Roof covering by making use of flat or curved slabs or stiff sheets > Connecting; Fastening > by specially-profiled marginal portions of the slabs or sheets

CPC:

Roof covering by making use of flat or curved slabs or stiff sheets (E04D1/00 takes precedence; built-up roofs E04D11/02) > Connecting; Fastening > by specially-profiled marginal portions of the slabs or sheets

Of 7 combined children, 2 exist in both systems.

4 codes are CPC-only extensions, 1 exist only in IPC.

Note: 3 CPC extensions are marked as secondary classification only.

1 shared codes have differing titles between IPC and CPC.

Child Classifications

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  • E04D 2003/3612 2nd only CPC only CPC only
  • E04D 2003/3615 2nd only CPC only CPC only
  • E04D 2003/3617 2nd only CPC only CPC only
  • E04D 3/362 by locking the edge of one slab or sheet within the profiled marginal portion of the adjacent slab or sheet, e.g. using separate connecting elements IPC+CPC Available in IPC and CPC
  • E04D 3/363 with snap action (E04D3/366 takes precedence) IPC+CPC Available in IPC and CPC
  • E04D 3/364 CPC only CPC only
  • E04D 3/3645 by interference fitting since 1985 IPC only IPC only

Top Applicants

Top Applicants (IPC)

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

Top Applicants (CPC)

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

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