CPC Subgroup Additional Only
E04F 2201/0523 Separate tongues; Interlocking keys, e.g. joining mouldings of circular, square or rectangular shape
Full Title
Joining sheets or plates or panels > Separate connectors or inserts, e.g. pegs, pins, keys or strips > Separate tongues; Interlocking keys, e.g. joining mouldings of circular, square or rectangular shape
7 direct subcodes
Child Classifications
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- E04F 2201/0529 the interlocking key acting as a dovetail-type key
- E04F 2201/0535 adapted for snap locking
- E04F 2201/0541 adapted to be moved along the joint edge
- E04F 2201/0547 adapted to be moved perpendicular to the joint edge
- E04F 2201/0552 adapted to be rotated around an axis parallel to the joint edge
- E04F 2201/0558 adapted to be rotated around an axis perpendicular to the joint edge
- E04F 2201/0564 depending on the use of specific materials
Top Applicants
Top 10 applicants by patent filingsfor 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