TREA

by another slitting or extracting member

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Industry

  • CPC
  • E21C31/025
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Parent Industries

EFIXED CONSTRUCTIONS E21Mining E21CMINING OR QUARRYING E21C31/00Driving means incorporated in machines for slitting or completely freeing the mineral from the seam

Current Industry

E21C31/025by another slitting or extracting member
Industries

Patents Grantslast 30 patents

  • Information Patent Grant

    2096917
    • Patent number 2,096,917
    • Issue date Oct 26, 1937
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    1612066
    • Patent number 1,612,066
    • Issue date Dec 28, 1926
    • E21 - EARTH DRILLING MINING

Patents Applicationslast 30 patents