Skip to content
PCE
Search Classifications
Search for IPC and CPC classification codes or keywords
DIFF Subgroup
E04D 3/24

with special cross-section, e.g. with corrugations on both sides, with ribs, flanges, or the like (E04D3/35 takes precedence)

Introduced: September 1968

Title

Titles differ between systems:

IPC: with special cross-section, e.g. with corrugations on both sides, with ribs, flanges, or the like

CPC: with special cross-section, e.g. with corrugations on both sides, with ribs, flanges, or the like (E04D3/35 takes precedence)

Full Title

Full titles differ between systems:

IPC:

Roof covering by making use of flat or curved slabs or stiff sheets > with special cross-section, e.g. with corrugations on both sides, with ribs, flanges, or the like

CPC:

Roof covering by making use of flat or curved slabs or stiff sheets (E04D1/00 takes precedence; built-up roofs E04D11/02) > with special cross-section, e.g. with corrugations on both sides, with ribs, flanges, or the like (E04D3/35 takes precedence)

IPC and CPC are identically structured here. All 5 subcodes exist in both systems.

1 shared codes have differing titles between IPC and CPC.

Child Classifications

Navigate with arrow keys, Enter to open

  • E04D 3/26 of concrete or ceramics IPC+CPC Available in IPC and CPC
  • E04D 3/30 of metal IPC+CPC Available in IPC and CPC
  • E04D 3/32 of plastics, fibrous materials, or asbestos cement IPC+CPC Available in IPC and CPC
  • E04D 3/34 of specified materials, or of combinations of materials, not covered by any one of groups E04D3/26 - E04D3/32 IPC+CPC Available in IPC and CPC

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