IPC Subgroup
E02B 7/1 Gravity dams, i.e. those in which the weight of the structure prevents overturning
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 > Gravity dams, i.e. those in which the weight of the structure prevents overturning
Classification Context
- Section:
- FIXED CONSTRUCTIONS
- Class:
- HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL-SHIFTING
- Subclass:
- HYDRAULIC ENGINEERING
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