DIFF Subgroup
E21F 17/04 Distributing means for power supply in mines
Introduced: September 1968
Title
Titles differ between systems:
IPC: Distributing means for power supply
CPC: Distributing means for power supply in mines
Full Title
Full titles differ between systems:
IPC:
Methods or devices for use in mines or tunnels, not covered elsewhere > Distributing means for power supply
CPC:
Methods or devices for use in mines or tunnels, not covered elsewhere (mine lighting F21, H05B) > Distributing means for power supply in mines
IPC and CPC are identically structured here. All 3 subcodes exist in both systems.
3 shared codes have differing titles between IPC and CPC.
Child Classifications
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- E21F 17/06 Distributing electric power; Cable networks; Conduits for cables (circuit arrangements for supplying or distributing electric power in general H02J) IPC+CPC Available in IPC and CPC
- E21F 17/08 Distributing hydraulic power; Pipe networks for hydraulic liquid (pipe-line systems in general F17D) IPC+CPC Available in IPC and CPC
- E21F 17/10 Distributing pneumatic power; Pipe networks for compressed air (pipe-line systems in general F17D) IPC+CPC Available in IPC and CPC