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IPC Subgroup
E02B 7/08

Wall dams

Introduced: September 1968

Last revised: January 2006

Full Title

Barrages or weirs; Layout, construction, methods of, or devices for, making same > Fixed barrages > Dams across valleys > Wall dams

Classification Context

Section:
FIXED CONSTRUCTIONS
Class:
HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL-SHIFTING
Subclass:
HYDRAULIC ENGINEERING

3 direct subcodes

Child Classifications

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  • E02B 7/1 Gravity dams, i.e. those in which the weight of the structure prevents overturning
  • E02B 7/12 Arch dams
  • E02B 7/14 Buttress dams

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