Machines incorporating two or more of the slitting means according to groups E21C25/02, E21C25/06, E21C25/16, E21C25/20 and E21C25/22

Industry

  • CPC
  • E21C25/52
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Patents Grantslast 30 patents

Patents Applicationslast 30 patents

  • Information Patent Application

    CUTTING ASSEMBLY

    • Publication number 20210032988
    • Publication date Feb 4, 2021
    • ELEMENT SIX (UK) LIMITED
    • MATTHEW JOHN IAN LEEMING
    • E21 - EARTH DRILLING MINING
  • Information Patent Application

    CONTINUOUS MINING MACHINE HAVING CORE CUTTING ASSEMBLY

    • Publication number 20160097276
    • Publication date Apr 7, 2016
    • Caterpillar Global Mining America LLC
    • Gregory Allen McCOY
    • E21 - EARTH DRILLING MINING
  • Information Patent Application

    UNMANNED INTELLIGENT MINING MACHINE

    • Publication number 20150275665
    • Publication date Oct 1, 2015
    • Xinping Han
    • E21 - EARTH DRILLING MINING