Movable barrages; Lock gates

Full Title

Barrages or weirs; Layout, construction, methods of, or devices for, making same (for protecting banks, coasts, or harbours E02B3/04; sealings or joints E02B3/16; handling building or like materials for hydraulic engineering E02D15/00; foundations in general E02D27/00) > Movable barrages; Lock gates

Filing statistics

CPC E02B 7/20 belongs to the parent subclass E02B, which recorded 50,164 patent applications worldwide between 2013 and 2023. Annual filings grew from 2,727 in 2013 to 4,705 in 2023 (+73%), peaking at 6,438 applications in 2020. The most active applicants in class E02 are KOMATSU (3,939 applications), CATERPILLAR (3,490 applications) and HITACHI CONSTRUCTION MACHINERY COMPANY (2,553 applications).

Source: EPO PATSTAT, worldwide filings

9 direct subcodes

Child Classifications

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E02B 7/205
E02B 7/22 Stop log dams; Emergency gates
E02B 7/24 Needle weirs
E02B 7/26 Vertical-lift gates
E02B 7/38 Rolling gates
E02B 7/40 Swinging or turning gates
E02B 7/50 Floating gates
E02B 7/52 Equipment preventing vibration of gates
E02B 7/54 Sealings for gates

Top Applicants

Top 10 applicants by patent filingsfor class E02, 2013–2023, worldwide · Source: EPO PATSTAT

KOMATSU JP 3,939
CATERPILLAR US 3,490
HITACHI CONSTRUCTION MACHINERY COMPANY JP 2,553
KOMATSU 1,789
JOHN DEERE US 1,277
HITACHI CONSTRUCTION MACHINERY COMPANY 1,102
KOBELCO CONSTRUCTION MACHINERY COMPANY JP 1,014
HOHAI UNIVERSITY 975
CHINA MCC17 GROUP COMPANY 810
VOLVO CONSTRUCTION EQUIPMENT SE 787