IPC Subgroup
E21F 17/18 Special adaptations of signalling or alarm devices
Introduced: September 1968
Last revised: January 2006
Full Title
Methods or devices for use in mines or tunnels, not covered elsewhere > Special adaptations of signalling or alarm devices
Classification Context
- Section:
- FIXED CONSTRUCTIONS
- Class:
- EARTH OR ROCK DRILLING; MINING
- Subclass:
- SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINAGE IN OR OF MINES OR TUNNELS
Related Keywords
signalling or alarm devices in MINE(S)