E04B 1/346 Rotary buildings; Buildings with rotary units, e.g. rooms
Full Title
Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs (scaffolds, shutterings E04G; structures specially adapted for buildings for special purposes, general layout of buildings, e.g. modular co-ordination, E04H) > Structures characterised by movable, separable, or collapsible parts, e.g. for transport (movable roof parts E04B7/16; floatable buildings B63B; small prefabricated buildings, transportable as a whole, E04H1/12; small garages E04H6/02; tents or canopies, in general E04H15/00) > Rotary buildings; Buildings with rotary units, e.g. rooms
Filing statistics
CPC E04B 1/346 belongs to the parent subclass E04B, which recorded 142,979 patent applications worldwide between 2013 and 2023. Annual filings grew from 7,367 in 2013 to 13,455 in 2023 (+83%), peaking at 18,847 applications in 2020. The most active applicants in class E04 are CHINA CONSTRUCTION EIGHTH ENGINEERING DIVISION (1,675 applications), CHINA MCC17 GROUP COMPANY (1,593 applications) and ZHEJIANG YASHA DECORATION COMPANY (1,551 applications).
Source: EPO PATSTAT, worldwide filings
1 direct subcode
Child Classifications
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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