CPC Main Group
E04G 23/00 Working measures on existing buildings, (; on foundations E02D35/00, E02D37/00; in connection with insulations E04B; subsequent or finishing work E04F)
7 direct subcodes
Child Classifications
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- E04G 23/02 Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
- E04G 23/04 Propping of endangered or damaged buildings or building parts, e.g. with respect to air-raid action (struts E04G25/00)
- E04G 23/06 Separating, lifting, removing of buildings; Making a new sub-structure
- E04G 23/08 Wrecking of buildings (of fences E04H17/26; )
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