Patent classifications
E
FIXED CONSTRUCTIONS
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E21
EARTH OR ROCK DRILLING; MINING
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E21C
MINING OR QUARRYING
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35/00
Details of, or accessories for, machines for slitting or completely freeing the mineral from the seam, not provided for in groups E21C25/00 - E21C33/00, E21C37/00 or E21C39/00
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E21C35/22
Equipment for preventing the formation of, or for removal of, dust
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E21C35/223
Equipment associated with mining machines for sucking dust-laden air from the cutting area, with or without cleaning of the air
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