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IPC Subgroup
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

Introduced: January 1995

Last revised: January 2006

Full Title

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

Classification Context

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

Top Applicants

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

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