IPC Main Group
E21D 19/00 Provisional protective covers for working space
Introduced: September 1968
Last revised: January 2006
Classification Context
- Section:
- FIXED CONSTRUCTIONS
- Class:
- EARTH OR ROCK DRILLING; MINING
- Subclass:
- SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
Related Keywords
protective SHIELD(S) in mining
3 direct subcodes
Child Classifications
Navigate with arrow keys, Enter to open
- E21D 19/02 for use in longwall working
- E21D 19/04 for use in drifting galleries
- E21D 19/06 Arrangements for applying the covers