IPC Subgroup
E02F 5/12 with equipment for back-filling trenches or ditches
Introduced: September 1968
Last revised: January 2006
Full Title
Dredgers or soil-shifting machines for special purposes > for digging trenches or ditches > with equipment for back-filling trenches or ditches
Classification Context
- Section:
- FIXED CONSTRUCTIONS
- Class:
- HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL-SHIFTING
- Subclass:
- DREDGING; SOIL-SHIFTING
Related Keywords
BACKFILLING of excavationsequipment for refilling DITCHESre- FILLING of excavationsequipment for refilling TRENCHES
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