CPC Subgroup Additional Only
E04F 2201/02 Non-undercut connections, e.g. tongue and groove connections
Full Title
Joining sheets or plates or panels > Non-undercut connections, e.g. tongue and groove connections
6 direct subcodes
Child Classifications
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- E04F 2201/021 with separate protrusions
- E04F 2201/023 with a continuous tongue or groove
- E04F 2201/025 with tongue and grooves alternating transversally in the direction of the thickness of the panel, e.g. multiple tongue and grooves oriented parallel to each other
- E04F 2201/026 with rabbets, e.g. being stepped
- E04F 2201/027 connected by tongues and grooves, the centerline of the connection being inclined to the top surface
- E04F 2201/028 connected by tongues and grooves with triangular shape
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