Methods or devices for use in mines or tunnels, not covered elsewhere (mine lighting F21, H05B)

Introduced: September 1968

Title

Titles differ between systems:

IPC: Methods or devices for use in mines or tunnels, not covered elsewhere

CPC: Methods or devices for use in mines or tunnels, not covered elsewhere (mine lighting F21, H05B)

Full titles differ between systems:

IPC:

Methods or devices for use in mines or tunnels, not covered elsewhere

CPC:

Methods or devices for use in mines or tunnels, not covered elsewhere (mine lighting F21, H05B)

IPC and CPC are identically structured here. All 5 subcodes exist in both systems.

4 shared codes have differing titles between IPC and CPC.

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E21F 17/02 Suspension devices for tubes or the like, e.g. for ventilating ducts (supporting pipes, cables or protective tubing in general F16L3/00 - F16L7/00) IPC+CPC Available in IPC and CPC
E21F 17/04 Distributing means for power supply in mines IPC+CPC Available in IPC and CPC
E21F 17/103 Dams, e.g. for ventilation since 1995 IPC+CPC Available in IPC and CPC
E21F 17/16 Modification of mine passages or chambers for storage purposes, especially for liquids or gases (storing fluids in natural or artificial cavities or chambers in the earth B65G5/00) IPC+CPC Available in IPC and CPC
E21F 17/18 Special adaptations of signalling or alarm devices (for mine lifts B66B; gas-sensitive devices per se G01N) +1 CPC IPC+CPC Available in IPC and CPC

Class E21,2013–2023, worldwide · Source: EPO PATSTAT

Class E21,2013–2023, worldwide · Source: EPO PATSTAT