IPC Subgroup
E21C 29/22 by wheels, endless tracks, or the like
Introduced: September 1968
Last revised: January 2006
Full Title
Propulsion of machines for slitting or completely freeing the mineral from the seam > by wheels, endless tracks, or the like
Classification Context
- Section:
- FIXED CONSTRUCTIONS
- Class:
- EARTH OR ROCK DRILLING; MINING
- Subclass:
- MINING OR QUARRYING
1 direct subcode
Child Classifications
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- E21C 29/24 Trucks carrying the machine while working