TREA

adjusting the height of the whole machine

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Industry

  • CPC
  • E21C29/28
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Parent Industries

EFIXED CONSTRUCTIONS E21Mining E21CMINING OR QUARRYING E21C29/00Propulsion of machines for slitting or completely freeing the mineral from the seam

Current Industry

E21C29/28adjusting the height of the whole machine
Industries

Patents Grantslast 30 patents

  • Information Patent Grant

    1704668
    • Patent number 1,704,668
    • Issue date Mar 5, 1929
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    1641430
    • Patent number 1,641,430
    • Issue date Sep 6, 1927
    • E21 - EARTH DRILLING MINING

Patents Applicationslast 30 patents