TREA

combined with scraper or collector box

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Industry

  • CPC
  • E21C27/42
This industry / category may be too specific. Please go to a parent level for more data

Parent Industries

EFIXED CONSTRUCTIONS E21Mining E21CMINING OR QUARRYING E21C27/00Machines which completely free the mineral from the seam

Current Industry

E21C27/42combined with scraper or collector box
Industries

Patents Grantslast 30 patents

  • Information Patent Grant

    2577924
    • Patent number 2,577,924
    • Issue date Dec 11, 1951
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    1704918
    • Patent number 1,704,918
    • Issue date Mar 12, 1929
    • E21 - EARTH DRILLING MINING

Patents Applicationslast 30 patents

  • Information Patent Application

    A CUTTING HEAD ASSEMBLY
    • Publication number 20240309761
    • Publication date Sep 19, 2024
    • OPTIMA MINING SYSTEMS PTY LTD
    • Benjamin Charles Michael BROWN
    • E21 - EARTH DRILLING MINING