Bunkers specially adapted for mining purposes

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CPC
E21F13/045

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EFIXED CONSTRUCTIONS E21Mining E21FSAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS E21F13/00Transport specially adapted to underground conditions

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E21F13/045Bunkers specially adapted for mining purposes

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Patents Grantslast 30 patents

Patents Applicationslast 30 patents

Information Patent Application
CONTINUOUS-EXTRACTION MINING SYSTEM
- Publication number 20140286738
- Publication date Sep 25, 2014
- Joseph J. Zimmerman
- E21 - EARTH DRILLING MINING