Tunnels submerged into, or built in, open water

Introduced: January 1995

Last revised: January 2006

Full Title

Underground or underwater structures; Retaining walls > Tunnels submerged into, or built in, open water

Classification Context

Section:: FIXED CONSTRUCTIONS
Class:: HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL-SHIFTING
Subclass:: FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES

Filing statistics

IPC E02D 29/063 belongs to the parent subclass E02D, which recorded 300,539 patent applications worldwide between 2013 and 2023. Annual filings grew from 11,339 in 2013 to 42,780 in 2023 (+277%). The most active applicants in class E02 are KOMATSU (3,549 applications), CATERPILLAR (2,893 applications) and HITACHI CONSTRUCTION MACHINERY COMPANY (2,390 applications).

Source: EPO PATSTAT, worldwide filings

4 direct subcodes

Child Classifications

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E02D 29/067 Floating tunnels; Submerged bridge-like tunnels, i.e. tunnels supported by piers or the like above the water-bed
E02D 29/07 Tunnels or shuttering therefor preconstructed as a whole or continuously made, and moved into place on the water-bed, e.g. into a preformed trench
E02D 29/073 Tunnels or shuttering therefor assembled from sections individually sunk onto, or laid on, the water-bed, e.g. in a preformed trench
E02D 29/077 Tunnels at least partially built beneath the water-bed characterised by being made by methods involving disturbance thereof all along the location line, e.g. by cut-and-cover or caisson methods

Top Applicants

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

KOMATSU JP 3,549
CATERPILLAR US 2,893
HITACHI CONSTRUCTION MACHINERY COMPANY JP 2,390
HITACHI CONSTRUCTION MACHINERY COMPANY 2,340
POWERCHINA HUADONG ENGINEERING CORPORATION 2,336
CHINA CONSTRUCTION EIGHTH ENGINEERING DIVISION 2,174
SGCC(STATE GRID CORPORATION OF CHINA) 2,119
HOHAI UNIVERSITY 1,821
KOMATSU 1,775
POWERCHINA GUIYANG ENGINEERING CORPORATION 1,725