DIFF Subgroup
E02B 9/02 Water-ways
Introduced: September 1968
Full Title
Water-power plants; Layout, construction or equipment, methods of, or apparatus for, making same > Water-ways
Of 3 combined children, 2 exist in both systems.
1 codes are CPC-only extensions.
2 shared codes have differing titles between IPC and CPC.
Child Classifications
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- E02B 9/04 Free-flow canals or flumes; Intakes (gratings or screens therefor E02B5/08) IPC+CPC Available in IPC and CPC
- E02B 9/06 Pressure galleries or pressure conduits; Galleries specially adapted to house pressure conduits; Means specially adapted for use therewith, e.g. housings, valves, gates (driving inclined galleries E21D9/02; valves in general F16K; conduits in general F16L) IPC+CPC Available in IPC and CPC
Top Applicants
Top Applicants (IPC)
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
Top Applicants (CPC)
Class E02,2013–2023, worldwide · Source: EPO PATSTAT
- KOMATSU JP 3,939
- CATERPILLAR US 3,490
- HITACHI CONSTRUCTION MACHINERY COMPANY JP 2,553
- KOMATSU 1,789
- JOHN DEERE US 1,277
- HITACHI CONSTRUCTION MACHINERY COMPANY 1,102
- KOBELCO CONSTRUCTION MACHINERY COMPANY JP 1,014
- HOHAI UNIVERSITY 975
- CHINA MCC17 GROUP COMPANY 810
- VOLVO CONSTRUCTION EQUIPMENT SE 787