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PCE
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CPC Subgroup Additional Only
E04F 2201/027

connected by tongues and grooves, the centerline of the connection being inclined to the top surface

Full Title

Joining sheets or plates or panels > Non-undercut connections, e.g. tongue and groove connections > connected by tongues and grooves, the centerline of the connection being inclined to the top surface

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