E
SECTION E — FIXED CONSTRUCTIONS
  
EARTH DRILLING; MINING
 E21
EARTH DRILLING; MINING
 E21

Note(s)

In this class, the following term is used with the meaning indicated:

  • "drilling" covers boring and vice versa.

 E21B
EARTH DRILLING, e.g. DEEP DRILLING (mining, quarrying E21C; making shafts, driving galleries or tunnels E21D); OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS FROM DEEP WELLS

 E21C
MINING OR QUARRYING
 E21C

Note(s)

  1. This subclass covers methods or apparatus specific to mining or quarrying. [3]
  2. This subclass does not cover, even though they may be disclosed only for mining or quarrying, drill bits, bore reamers, core taking devices, drilling pipes or rods, handling, racking or connecting arrangements for drilling pipes or rods, counterboring or enlarging drilled holes, flame drilling, or other drilling apparatus, which are covered by subclass E21B[3]

 E21D
SHAFTS; TUNNELS; GALLERIES (drilling or cutting machines for mining or quarrying E21C; safety devices, transport, rescue, ventilation or drainage E21F)  [2]

 E21F
SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINAGE IN OR OF MINES OR TUNNELS  [2]