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PCE
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CPC Subgroup
E04D 3/366

by closing the space between the slabs or sheets by gutters, bulges, or bridging elements, e.g. strips

Full Title

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 closing the space between the slabs or sheets by gutters, bulges, or bridging elements, e.g. strips

Top Applicants

Top 10 applicants by patent filingsfor 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